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At least 19 recordsLinked to original sources
PubMed1987

Physiological and biomechanical comparison of roller skating and speed skating on ice.

Eight well trained marathon skaters performed all-out exercise tests during speed skating on ice and roller skating. To compare these skating activities in relation to the concept of training specificity, relevant physiological (VO2, VE, RER and heart rate) and biomechanical variables (derived from film and video analysis) were measured. There were no significant differences between oxygen uptake (50.5 +/- 8.0 and 53.3 +/- 6.7 ml.min-1.kg-1), ventilation (102.4 +/- 11.2 and 116.0 +/- 11.1 1.min-1) or heart rate (174 +/- 12.2 and 176 +/- 14.5 min-1) between speed and roller skating. In roller skating a higher RER (1.16 +/- 0.1 cf. 1.05 +/- 0.1) was found. Power, work per stroke and stroke frequency were equal. Due to a higher coefficient of friction the maximal roller skating speed was lower. The effectiveness of push-off and parameters concerning the skating techniques showed no differences. In roller skating a 7.5% higher angle of the upper leg in the gliding phase occurred. It is speculated that the blood flow through the extensor muscles might be higher in roller skating. It is concluded that roller skating can be considered as a specific training method which may be used by trained speed skaters in the summer period.

Adult↗
PubMed2004

Children should wear helmets while ice-skating: a comparison of skating-related injuries.

OBJECTIVE: This study compares injuries, especially head injuries, among ice-skaters with those among skateboarders, rollerskaters, and in-line skaters, to determine the need for helmet use during recreational ice-skating by children. DESIGN: A comparative study of a consecutive series of patients. SETTING: The emergency department of a large, urban, academic, children's hospital. PARTICIPANTS: Children treated for injuries related to recreational ice-skating, skateboarding, rollerskating, and in-line skating. RESULTS: During a 31-month period, 419 consecutive children were evaluated in the emergency department for skating-related injuries. Children were predominantly male (53.9%), with a mean age of 10.0 years (SD: 3.0 years; median: 10.0 years; range: 1-18 years). The most frequent mechanism of injury was a fall. Overall, 76.5% of children (215 of 281 children) were reported to be wearing no protective equipment, such as a helmet or padding on the elbows or knees, at the time of injury. Ice-skaters were more likely to have adult supervision than were skateboarders (relative risk [RR]: 5.16; 95% confidence interval [CI]: 2.13-12.46), rollerskaters (RR: 1.21; 95% CI: 1.09-1.35), and in-line skaters (RR: 2.08; 95% CI: 1.72-2.51). Ice-skaters were at greater risk of injury to the head (20.0%) than were in-line skaters (4.9%) (RR: 4.09; 95% CI: 1.81-9.23); a weak difference was noted between ice-skaters and rollerskaters (9.9%) (RR: 2.18; 95% CI: 1.04-4.57), with no significant difference in head injuries between ice-skaters and skateboarders (15.9%) (RR: 1.60; 95% CI: 0.54-2.93). Ice-skaters demonstrated lacerations to the head in 68.8% of abnormal head examinations, compared with 37.0% for rollerskaters (RR: 1.86; 95% CI: 1.08-3.20) and 50.0% for in-line skaters (RR: 2.06; 95% CI: 1.35-3.16); however, there was no significant difference in lacerations to the head between ice-skaters and skateboarders (53.3%) (RR: 1.29; 95% CI: 0.76-2.19). Injuries to ice-skaters occurred more often in an indoor skating facility (92.9%, 52 of 56 cases), compared with injuries to skateboarders (3.6%, 1 of 28 cases) (RR: 13.96; 95% CI: 2.01-96.76), rollerskaters (63.4%, 59 of 93 cases) (RR: 1.46; 95% CI: 1.23-1.74), and in-line skaters (10.9%, 15 of 137 cases) (RR: 8.48; 95% CI: 5.23-13.75). CONCLUSIONS: The proportion of head injuries among ice-skaters in this study was greater than that observed for participants in other types of skating, for which helmet use is recommended and often required. Children should wear a helmet during recreational ice-skating. Mandatory helmet use by pediatric ice-skaters at indoor rinks should be implemented. Use of other types of protective equipment, such as wrist guards, knee pads, and elbow pads, should be considered for prevention of injuries to the extremities during ice-skating. Caution should be used when allowing young children to participate in recreational ice-skating. Additional research should be conducted in other populations, to corroborate these findings and to evaluate ice-skating safety recommendations for children.

Adolescent↗
PubMed2006

Influence of figure skating skates on vertical jumping performance.

The purpose of this study was to investigate the influence of wearing figure skating skates on vertical jump performance and interjoint co-ordinations described in terms of sequencing and timing of joint rotations. Ten national to international figure skaters were filmed while performing a squat jump (SJ) on a force platform. Three experimental conditions were successively realized: barefoot (BF), lifting a 1.5 kg weight (LW) corresponding to the skates' mass, attached on the distal extremity of each leg and wearing skates (SK). Jump height, angular kinematics as well as joints kinetics were calculated. Relative to the SJ height reached in the BF condition, SJ performance was significantly decreased by 2.1 and 5.5 cm in the LW and SK conditions, respectively. The restriction of ankle amplitude imposed by wearing skates was found to significantly limit the knee joint amplitude while the hip angular motion was not affected. Neither the skates' mass nor the limited ankle angular motion modified the proximo-distal organization of joint co-ordination observed when jumping barefoot. However, with plantar flexion restriction, the delay between hip and knee extensions increased while it was reduced between knee and ankle extensions. Work output at the knee and ankle joints were significantly lowered when wearing skates. The decrease of work at the knee was shown to result from an early flexing moment causing a premature deceleration of the knee and from a reduction of knee amplitude. Taken together, these results show a minimization of the participation of the knee when plantar flexion is limited. It was proposed that constraining the distal joint causes a reorganization of interjoint co-ordinations and a redistribution of the energy produced by knee extensors to the hip and ankle joints.

Adolescent↗
PubMed2000

Push-off mechanics in speed skating with conventional skates and klapskates.

PURPOSE: Personal and world records in speed skating improved tremendously after the introduction of the klapskate, which allows the foot to plantar flex at the end of the push-off while the full blade continues to glide on the ice. The purpose of this study was to gain insight into the differences in skating technique with conventional versus klapskates and to unveil the source of power enhancement using klapskates. METHODS: Ten elite speed skaters skated four 400-m laps at maximal effort with both conventional and klapskates. On the straight high-speed film, push-off force and EMG data were collected. An inverse dynamics analysis was performed in the moving reference plane through hip, knee, and ankle. RESULTS: Skating velocity increased 5% as a result of an increase in mean power output of 25 W when klapskates were used instead of conventional skates. The increase in mean power output was achieved through an 11-J increase in work per stroke and an increase in stroke frequency from 1.30 to 1.36 strokes x s(-1). The difference in work per stroke occurs during the final 50 ms of the push-off. This is the result of the ineffective way in which push-off forces are generated with conventional skates when the foot rotates about the long front end of the blade. No differences in muscle coordination were observed from EMG. CONCLUSION: A hinge under the ball of the foot enhances the effectiveness of plantar flexion during the final 50 ms of the push off with klapskates and increases work per stroke and mean power output.

Adult↗
PubMed2003

A comparison of skating economy on-ice and on the skating treadmill.

The purpose of this study was to compare skating economy and oxygen uptake (VO2) on-ice and on the skating treadmill (TM). Male varsity hockey players (n = 15, age = 21.0 yr) performed skating tests on a TM and on-ice. The subjects skated for 4 min at each of 3 submaximal velocities (18, 20, and 22 km . h(-1)), separated by 5 min of passive recovery. A VO2max test followed the submaximal tests and commenced at 24 km . h(-1) with the velocity increasing by 1 km . h(-1) every minute until volitional fatigue. VO2 was 39.7, 42.9, 46.0, and 53.4 ml . kg(-1) . min(-1) at 18, 20, 22, and maximum speed (km . h(-1)) on the TM. VO2 was significantly lower (p < .05) 31.5, 36.9, and 42.7 ml . kg(-1) . min(-1) at 18, 20, and 22 km . h(-1) on-ice. The on-ice VO2max (54.7 ml . kg(-1) . min(-1)) was similar to TM. Stride rate, stride length and heart rate (HR) were significantly different on-ice compared to TM. These results show that at submaximal velocities, VO2, HR, and stride rate are higher on TM compared to on-ice. VO2max was similar while HRmax was higher on the skating treadmill compared to on-ice

Adult↗
PubMed1989

[Roller skating accidents. 393 roller skating accidents treated at the casualty department of Odense Hospital during the period 1 January 1980 to 30 September 1988].

During recent years, the import of roller skates has increased markedly and, during the period 1.1.1980-30.9.1988, an increase has been observed in the number of roller skate accidents treated in the Casualty Department of Odense Hospital. These accidents are particularly frequent in early spring and involve children under the age of 15 years, in particular, with slight preponderance of girls. The typical mechanism of injury is a fall which the victim tries to mitigate with the hands and arms. Nearly 90% of all injuries were localized to the locomotor system and just under half of the patients sustained fractures, typically of the wrist. Over 8% of the injuries necessitated hospitalization. The great majority of accidents occurred in unorganized groups and not in clubs, in ordinary traffic and without the use of protective equipment. In a selected group of roller skaters, as in this investigation, no connection could be found between the type of roller skates, employment of protective equipment and the frequency of fractures. The actual risk in roller skating is not known but possible prophylactic measures are discussed and simple safety rules are recommended.

Adolescent↗
PubMed1998

Skateboarding: more dangerous than roller skating or in-line skating.

OBJECTIVE: To describe the circumstances, severity, and outcomes of skating-related injuries among children admitted to trauma centers. DESIGN: A cross-sectional comparison of roller skaters (n = 154), in-line skaters (n = 190), and skateboarders (n = 254) aged 5 to 19 years who were hospitalized with injuries. SETTING: Seventy-nine hospitals and pediatric trauma centers participating in the National Pediatric Trauma Registry between October 1988 and April 1997. RESULTS: Three quarters (75.8%) of the study sample were male, nearly half (47.8%) were injured on roads, and more than one third (37.1%) had head injuries. Among skateboarders, 50.8% had head injuries compared with 33.7% of in-line skaters and 18.8% of roller skaters (P<.001). According to the Injury Severity Score, injuries to skateboarders were 8 times more likely to be severe or critical compared with roller skaters' injuries and more than 2 times as likely to be severe or critical compared with in-line skaters' injuries. Mean hospital length of stay was 6.0 days for skateboarders, 3.4 days for in-line skaters, and 2.4 days for roller skaters (P<.001). Skateboarders were more likely to be male and to be injured on roads than were in-line skaters or roller skaters. CONCLUSIONS: Skateboarding-related injuries are more severe and have more serious consequences than roller skating or in-line skating injuries. Research is needed to identify ergonomic and behavioral factors responsible for higher head injury risk to skateboarders, and interventions are needed to reduce the risk.

Accidental Falls↗
PubMed1991

Bombesin-like immunoreactivity in skates and the in vitro effect of bombesin on coronary vessels from the longnose skate, Raja rhina.

Bombesin-like immunoreactivity is present in nerve fibers projecting to the cardiovascular system, including the coronary arteries, and to the gastrointestinal canal, and in endocrine cells of the gut of skates belonging to the family Rajidae. Synthetic bombesin contracted isolated coronary rings from the longnose skate, Raja rhina, in a cumulative fashion. The contractile response was 84% of that of 60 mM potassium chloride. The pD2-value for bombesin was 8.83 (S.E.M. = 0.33; n = 15). Phentolamine, atropine and two substance P-antagonists increased the sensitivity to bombesin, while atenolol, sotalol, nifedipine, tetrodotoxin and two bombesin antagonists were devoid of significant effects. We conclude from this study that a bombesin-like peptide is present in nerves innervating the cardiovascular system and the gastrointestinal canal of skates of the family Rajidae, and that bombesin contracts coronary vessels in vitro via a direct mechanism and/or via mechanisms involving alpha-adrenergic and muscarinergic receptors.

Animals↗
PubMed2000

[Roller skating accidents. Registration of roller skating injuries in two emergency departments].

Rising popularity of roller-skates in recent years has resulted in increasing numbers of accidents involving roller-skates. The subject of our study was a consecutive number of patients who were treated at the casualty departments of Svendborg and Middelfart hospitals, Denmark, between July 1997 and June 1998. A total number of 169 patients representing 179 injuries were registered. A high incidence of injuries was found among children of school age. Protective equipment was used, in 31% (n = 52) of cases, which shows an increase compared to previous studies in Denmark (1). Injuries of the distal antebrachium, wrist and metacarpals account for 45% of all injuries. Wrist guards protect the area but do not completely eliminate the risk of fractures and injuries. A larger usage of protective equipment will probably result in a decrease in the number of injuries, and therefore information about protective measures is essential.

Adolescent↗
PubMed2000

[Roller skating accidents--the pattern of injuries and use of protective devices. Roller skating accidents in Viborg 1995-1998].

Circumstances and outcome of roller skating accidents (RSA) and the use of protective gear was surveyed. During 1.1.95-31.12.98 a questionnaire survey was conducted among subjects involved in RSA and combined with data from the A + E dept. A major increase in RSA was reported during this four year study period. A total of 399 injuries were recorded, of which 178 had wrist-related injuries and of which 125 had fractures. RSA accounted for a total of 17% of all wrist fractures among 11-15 year-old teenagers. In 1998 this percentage had increased to 28%. The median age for wrist fracture was 12.6 years. Of the 325 injured who answered the questionnaire, 67% (mostly children) did not use any kind of protective gear, and only 64% had purchased such gear. Beginners and experienced skaters showed differences regarding characteristics and risk profile. Education in non-risk behaviour and the recommendation of wrist guards seems permissible, as the number of injured is suspected to be steadily growing among teenagers.

Adolescent↗
PubMed1997

[Skating injuries. A study of an injury sample in a Danish community skating rink].

A review is presented of injuries sustained at an ice rink and treated at the emergency room, Odense University Hospital in Denmark, during 1993. Of the 105 patients treated, 67 (64 per cent) were 10-19 years of age. Most patients had been injured during a fall, no other participant being involved. About 25 per cent of the injuries were lesions the face or head. In seven cases the patient had been cut on the hand by the blade of another participant's skate, two patients had tendon lesions and in 16 cases the patient had sustained a fracture of the forearm or hand as the result of a fall. Many of the injuries could have been prevented by the use of protective gear (helmet, gloves and knee and elbow pads).

Adolescent↗
PubMed1996

In-line skate and rollerskate injuries in childhood.

OBJECTIVE: To describe the estimated frequency and types of injuries associated with in-line skates in U.S. children and to compare in-line skating injuries to rollerskating injuries. DESIGN: National case series. SETTING: Emergency departments of hospitals participating in the United States Consumer Product Safety Commission (USCPSC) National Electronic Injury Surveillance System. PATIENTS: Persons with injuries associated with the use of in-line skates or rollerskates reported to the USCPSC in 1992 and 1993. RESULTS: There were an estimated 66,465 injuries associated with in-line skates; the incidence of injury was highest in children 11 and 12 years old. An estimated 40,730 in-line skate injuries involved children < 20 years old. The mean age of injured children was 11.8 years (median, 12 years); 68% were boys. Fractures (45%) were the most common injury; 66% of fractures involved the distal forearm. Five percent had head injuries. Two and one half percent required hospital admission; 90% of children admitted had a fracture and 11% had a head or face injury. There were an estimated 147,928 rollerskating injuries among children < 20 years old; the mean age was 10.5 years (median 10 years) (P < 0.001 vs in-line skates). Thirty-two percent were to boys (P < 0.001 vs in-line skates). Fractures were the most common injury; forearm fractures accounted for 72% (P < 0.001 vs in-line skates). Five percent had head injuries. One and one half percent were admitted to the hospital (P < 0.001 vs in-line skates). In 1993, the injury rate among children for in-line skates was 31/100,000, and the injury rate for rollerskates was 95/100,000. CONCLUSIONS: Injuries associated with in-line skates are highest among preadolescents. Injuries associated with in-line skate use are less common than injuries associated with rollerskate use. Distal forearm fractures are the most common injuries related to both in-line skate and rollerskate use. Exposure data and analysis of the efficacy of protective gear, including wrist guards and helmets, are needed.

Age Distribution↗
PubMed1993

Metabolic cost of ice and in-line skating in Division I collegiate ice hockey players.

This study compared the metabolic cost of ice skating and in-line skating in Division I collegiate hockey players. Heart rate and oxygen uptake were compared between the two conditions at three skating velocities: 12.5 km.h-1, 16.5 km.h-1, and 20 km.h-1. Twelve subjects were tested on two occasions: on ice (ice skating) and off ice (in-line skating). They skated for 3 min at each velocity, with heart rate recording and gas collection taking place during the final 30 s of each stage. A two-factor repeated measures ANOVA revealed that the chosen velocities affected the two conditions differently for heart rate (p < .01). No interaction between condition and velocity was found for absolute (p < .43) and relative (p < .15) oxygen uptake. In-line skating produced significantly greater heart rate values and absolute oxygen uptake values than ice skating at all three velocities (p < .05). In-line skating also generated significantly greater relative oxygen uptake values at 16.5 km.h-1 and 20 km.h-1. Results suggest that the metabolic cost of in-line skating is greater than that of ice skating for collegiate ice hockey players when skating at three velocities similar to those skated during game conditions.

Adult↗
PubMed2006

Injuries in synchronized skating.

Synchronized skating is a relatively new competitive sport and data about injuries in this discipline are lacking. Therefore the purpose of this study was to investigate the frequency and pattern of acute and overuse injuries in synchronized skaters. Before and during the World Synchronized Skating Championship 2004, a questionnaire inquiring about the frequency of injuries in this skating discipline was given to 23 participating teams. A total of 514 women and 14 men senior skaters completed the questionnaires (100 % response). Two hundred and eighteen (42.4 %) female and 6 (42.9 %) male skaters had suffered from acute injuries during their synchronized skating career. As some skaters had suffered from more than one injury, the total number of acute injuries in females was 398 and in males 14. In female skaters 19.8 % of acute injuries were head injuries, 7.1 % trunk, 33.2 % upper, and 39.9 % lower extremity injuries. In male skaters 14.3 % were head injuries, 28.6 % upper, and 57.1 % lower extremity injuries, with no report of trunk injuries. Sixty-nine female and 2 male skaters had low back problems and 112 female and 2 male skaters had one or more overuse syndromes during their skating career. Of 155 overuse injuries in female skaters, 102 (65.8 %) occurred during their figure skating career, while 53 injuries (34.2 %) only occurred when they skated in synchronized skating teams. In male skaters, out of 5 overuse injuries, 4 (80 %) occurred in their figure skating career, while 1 (20 %) occurred during their synchronized skating career. Out of the total of 412 injuries, 338 (82 %) occurred during on-ice practice, while 74 (18 %) happened during off-ice training. Ninety-one (26.9 %) acute injures occurred while practicing individual elements, and 247 (73.1 %) on-ice injuries occurred while practicing different team elements. We conclude that injuries in synchronized skating should be of medical concern due to an increasing number of acute injuries, especially those that go beyond the soft tissue and include head injuries and fractures. We feel that these more significant injuries MAY TO SOME EXTENT BE attributable to the increasing physical demands and technical difficulty required of the teams now participating in a more competitive environment over the last four years.

Adolescent↗
PubMed2002

Effects of vibration in inline skating on the Hoffmann reflex, force, and proprioception.

PURPOSE: The objective of this study was to examine the effects of vibrations induced by inline skating on the Hoffmann (H) reflex, maximal voluntary isometric (MVC) force, and ankle proprioception. METHODS: Accelerometers were used to measure the frequencies and amplitudes of the vibrations encountered at the skate and mid-tibia levels. The soleus H reflex was recorded before and after (for 30 min) inline skating for 30 min. Maximal plantarflexor contractions were performed against a strain gauge while EMG was recorded from the soleus and medial gastrocnemius muscles. An ankle position-matching test was carried out to measure proprioception at the ankle. A Modified Borg Scale was used to obtain the appreciation of leg numbness and fatigue during inline skating. RESULTS: The vibrations measured at the skate chassis level had a mean frequency of 141.8 +/- 25.2 Hz and an amplitude of </=5 g. These vibrations were transmitted to the lower limb as measured by a mean frequency of 34.4 +/- 27.7 Hz and an amplitude of </=2 g at the mid-tibia level. The results demonstrate a clear inhibition ( approximately 35%) of the H reflex after skating that persisted for >35 min after skating. A 10% drop in MVC plantarflexor force was observed after inline skating. There was no accompanying change in EMG signal parameters. The ankle proprioception of the subjects decreased after skating, resulting in reproduction errors twice as large as before skating. CONCLUSION: Vibrations encountered during inline skating resulted in modifications of neuromotor functions related to the muscle spindles' primary afferent. These changes may partially be explained by presynaptic inhibition; however, a more plausible mechanism may be a decrease in the Ia afferent transmission induced by the vibration.

Acceleration↗
PubMed1987

Specific characteristics of speed skating: implications for summer training.

Fourteen well-trained speed skaters performed all-out exercise tests during ice speed skating, low walking (walking-like movement in skating position), and dry skating (side to side deep sitting push-offs). These dry land training activities, widely used by speed skaters during the summer period, are compared to speed skating in relation to the concept of training specificity. Relevant physiological and biomechanical variables (derived from film and video analysis) were measured. The maximal oxygen uptake achieved in low walking (60.0 +/- 5.8 ml.kg-1.min-1) was not significantly different to that achieved during speed skating (62.1 +/- 6.9), but the maximal level attained in dry skating (48.4 +/- 5.5) was significantly less than both of these. The biomechanical differences measured are substantial. The forward directed push-off, the more dynamic movement pattern in hip and knee joints, and the use of plantar flexors during low walking are essentially different from speed skating. In dry skating, a more convulsive movement pattern due to the fixed push-off position compared to speed skating was found. The consequences of the typical skating position on the physiological responses is discussed. It is concluded that neither low walking nor dry skating can be considered as specific training activities for speed skaters.

Adult↗
PubMed2004

[Injury pattern caused by aggressive inline skating].

In order to evaluate the special injury pattern of aggressive inline skating, a field study was conducted in a local, non-commercial skate park equipped with all the typical features like ramps, halfpipes, gully areas. 66 unselected aggressive inline skaters were randomly enrolled and interviewed concerning their skating habits and their skating injury history. Average age was 15 (10 to 41) years, skating was performed since 2.1 (0.1 to 6) years, as aggressive skating since 1.3 (0.1 to 4) years. Medical treatment in a doctor's practice or in a hospital had been necessary in 66 cases, averaging 1.4 times per skater and year, averaging one injury per 586 hours of aggressive skating. The injury pattern reflected the regions typically injured in fitness skating, too, with a higher percentage of injuries concerning knee, tibia and ankle region. The use of protective devices varied from 41 % (wrist guards) to 94 % (knee pads), with an average of 69 %. Only 32 % of skaters wore all protective devices. As the personal thrill is an important motivation for aggressive skating, safer skating campaigns are quite unlikely to decrease the risk of injury in aggressive skaters.

Adolescent↗