Biomedical subjects

Lesley D Fox

Publications and source records attributed to Lesley D Fox.

3 recordsLinked to original sources

PubMed2005

Changing weight-loss expectations: a randomized pilot study.

Participants in weight-loss programs expect unreasonably large weight losses and believe that such reductions will produce dramatic improvements in their lives. The failure to achieve such benefits may contribute to poor maintenance of lost weight. This randomized pilot study investigated a new cognitive-behavioral intervention designed to modify unrealistic expectations regarding weight loss and its likely impact on appearance, attractiveness, and self-esteem. Twenty-eight overweight and obese young women who completed 10 sessions of standard behavioral weight-loss treatment were randomly assigned to 10 additional sessions of either standard behavioral (SB) treatment or a reformulated cognitive-behavioral (RCB) treatment. At posttreatment, the RCB intervention produced more realistic weight-loss expectations, decreased participants' motivation to lose weight as a means of improving self-confidence, and increased their overall self-esteem, compared with the SB condition (all p's<.05). The mean posttreatment weight changes achieved in the SB (-6.2+/-4.5 kg) and RCB (-5.5+/-3.6 kg) conditions were equivalent, as were the amounts of weight regained during a 6-month follow-up (SB=2.3+/-2.7 kg; RCB=1.5+/-1.7 kg). Collectively, these findings indicate that the RCB intervention was effective in changing unrealistic weight-loss expectations, but it did not produce significantly better maintenance of lost weight than did the SB intervention.

Adolescent↗

PubMed2003

Effects of low volume resistance and cardiovascular training on strength and aerobic capacity in unfit men and women: a demonstration of a threshold model.

A threshold model postulates that prescriptively applying the appropriate cardiorespiratory and strength stimulus at a designated threshold of intensity for a brief time results in the targeted adaptations. A randomized control group design was used with 17 unfit males and females (mean age = 37.1 +/- 6.5 year) assigned to an exercise group (n = 9) who performed a progressive cardiovascular graded exercise protocol and resistance training twice a week for 12 weeks or a nonexercising control group (n = 8). The intervention included a graded exercise protocol involving a 3-min warm-up, exercising 3-4 min at 70-80% of maximum heart rate, and a 3-min cooldown. Progressive resistance exercise consisted of one set of six repetitions on each of six resistance machines. Results showed that the exercise group increased predicted aerobic capacity by 13.4% (p < 0.05), decreased submaximal rate pressure product by 17.2% (p < 0.05), and increased strength by 34% (p < 0.01). The results support a threshold model and show that time for effective exercise can be substantially reduced.

Adaptation, Physiological↗

PubMed2003

Older adults with chronic disease: benefits of group-mediated counseling in the promotion of physically active lifestyles.

In this 12-month trial standard exercise training was compared with a group-mediated cognitive-behavioral (GMCB) intervention with respect to effects on long-term adherence and change in physical function of older adults who were either at risk for or had cardiovascular disease. Participants (147 older men and women) were randomized to the 2 treatments. Outcomes included self-reportedphysical activity, fitness, and self-efficacy. The GMCB treatment produced greater improvements on all outcomes than did standard exercise therapy. Regardless of treatment assignment, men had more favorable change on the study outcomes than did women. Analysis of a self-regulatory process measure in the GMCB group revealed that change in barriers efficacy was related to change in physical activity and fitness. Results suggest that teaching older adults to integrate physical activity into their lives via GMCB leads to better long-term outcomes than standardized exercise therapy.

Aged↗