Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2003) 02, 117 - 122

Research article
Aerobic Energy Expenditure During Recreational Weight Training in Females and Males
Beth Morgan, Sarah J. Woodruff, Peter M. Tiidus 
Author Information
Department of Kinesiology & Physical Education, Wilfrid Laurier University, Waterloo ON, Canada

Peter M. Tiidus
✉ Department of Kinesiology & PE, Wilfrid Laurier University, 75 University Ave. W. Waterloo ON Canada N2L 3C5
Email: ptiidus@wlu.ca
Publish Date
Received: 19-07-2003
Accepted: 14-08-2003
Published (online): 01-09-2003
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ABSTRACT

The influence of gender on aerobic energy expenditure (EE) during weight training has not been systematically researched. We determined the absolute and relative EE during the performance of two weight training programs of different intensities, durations and total work in males and females. Eight male and seven female recreational weight trainers (20-29 y) completed two randomly ordered weight training sessions involving 2 sets of 8 standard upper and lower body lifts at a set cadence separated by 45 seconds rest between sets and lifts (48 hrs apart). Heavy (H) at 100% 8 Repetition Maximum (8RM), 8 reps, ~19 min duration and light (L) at 85% 8RM, 15 reps, ~23 min duration. VO2 was determined continuously throughout the training sessions. Lean body mass (LBM) was estimated from skin fold measures and body weight. Energy expenditure was estimated from breath-by-breath metabolic measurements using portable metabolic assessment equipment (Cosmed K4b2). Absolute EE (total kJ) and rate of energy expenditure per minute (kJ per min) were not significantly different between H and L intensities and male and female subjects. The rate of EE averaged between approximately 10-12 kJ per min. However, relative EE (J per kg LBM per min per unit work) were significantly higher (p < 0.02) for females compared to males in both H: (26.46±8.06 females vs 14.36±3.02 males) and L: (19.91±4.28 females vs. 9.83±3.28 males), intensities. It was concluded that females rely on a greater relative aerobic EE than males when performing recreational type weight lifting programs.

Key words: Weight training, gender, aerobic energy expenditure


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