Biomedical subjects

John F Caruso

Publications and source records attributed to John F Caruso.

3 recordsLinked to original sources

PubMed2003

Inclusion of eccentric actions on net caloric cost resulting from isoinertial resistance exercise.

Net O(2) uptake was measured from maximal-effort 3-set, 8-repetition seated leg press protocols on an isoinertial ergometer. Subjects (25 women, 9 men) did 2 workouts each exerting concentric-eccentric (CE) and concentric-only (CO) knee extensor forces to measure work and net caloric cost. Significant (p < 0.05) relationships between work and net caloric cost resulted from CE and CO workouts for the male, female, and total subject sample. Two-way repeated-measures analyses of variance showed CE workouts resulted in significantly higher work but not net caloric cost and values. CE workouts likely relied on the knee extensors series elastic element to perform an additional approximately 3,600 J of eccentric work at no additional net caloric cost. Unlike other exercise modes, maximal-effort eccentric actions on the isoinertial ergometer, as done in the current study, provide no additional net caloric cost and is thus safe to administer to populations in whom metabolic cost is a concern.

Adult↗

PubMed2003

A multivariate approach to predicting knee extensor performance.

The impact of two predictor variables (estimated knee extensor fast-twitch fiber percentage, body mass) on performance measures (vertical jump power output, leg press peak angular velocity) were examined. Subjects (25 men, 27 women) performed 5 workouts involving 2 vertical jump, leg press, and 50-repetition isokinetic tests (to estimate knee extensor fast-twitch fiber percentage). Multivariate regression determined the following significant (p < 0.05) vertical jump equations: predicted male power output = -59.3464 + 1.566 (estimated knee extensor fast-twitch muscle fiber percent) + 15.7884 (body mass), predicted female power output = 36.1574 + 3.4248 (estimated knee extensor fast-twitch muscle fiber percent) + 9.8633 (body mass). Leg press peak angular velocity equations were insignificant by gender; thus, pooled data yielded the following: predicted leg press peak angular velocity = 18.6187 + 0.235 (estimated knee extensor fast-twitch muscle fiber percent) + 0.3801 (body mass). Body mass explained more variance for each performance measure.

Adult↗

PubMed2002

Net caloric cost of a 3-set flywheel ergometer resistance exercise paradigm.

Subjects (n = 23) performed three 3 x 8 seated leg press workouts on a flywheel ergometer to note the net caloric cost. This study's purpose was to examine net caloric cost as a function of total work on an inertial resistance exercise device offering more eccentric loading than conventional isotonic weight training equipment. High intraclass correlations for net caloric cost (0.89) and total work (0.94) result from data collected from 3 workouts. Average total work and net caloric cost values reveal a significant (r = 0.62, p < 0.05) correlation yielding the following equation: predicted net caloric cost = 33.2 + 0.006014331 (total work). Current study data also show favorable net caloric cost (1.24 kcal x kg(-1) x d(-1)), exercise efficiency (9.48 kcal x 10(-3) per joule), and estimated mechanical loading (65 W min x kg(-1) LBM x d(-1)) values. The results of the current study serve as baseline knowledge for exercise prescriptions pertaining to net caloric cost, exercise efficiency, and mechanical loading using this device.

Adult↗