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Caloric Expenditure and Physiological Responses During and Following a Suspension Training Workout

Caloric Expenditure and Physiological Responses During and Following a Suspension Training Workout. Sigma Xi Brown-bag Lunch October 16, 2009 Dr. Wes Dudgeon. Background . What is TRX ® /suspension training? Body Weight resistance Unstable surfaces

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Caloric Expenditure and Physiological Responses During and Following a Suspension Training Workout

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  1. Caloric Expenditure and Physiological Responses During and Following a Suspension Training Workout Sigma Xi Brown-bag Lunch October 16, 2009 Dr. Wes Dudgeon

  2. Background • What is TRX ® /suspension training? • Body Weight resistance • Unstable surfaces • Requires “Core” muscle use for all exercises • Emphasizes flexibility • Interval-Type training

  3. Where do we (I) come in? • Many claims made by manufacturer, but……… No Data to Back it up!! • Research questions we asked (this time): • What is the “stress” placed on the body by a TRX® workout? (HR, BP, RPE) • What is the “metabolic effect” of a typical TRX® workout? (caloric expenditure, substrate usage)

  4. Study Design • Descriptive study • 9 college age males (21.4  0.9 years, 176.7  3.3 cm, 68.8  3.6 kg, 13.4  1.7% body fat) • 2 Familiarization sessions • Testing day included: • BodPod for body fat %, Fitting of a HR monitor, attachment to Metabolic Cart® (ParvoMedics), insertion of indwelling venous catheter • 30 min resting energy expenditure • 60 min training session • 120 min cool down

  5. Variables of Interest • food + O2 CO2 + H2O + energy (ATP) • RER = VCO2 / VO2 • reflects ratio of CHO and fat metabolism • 100% CHO metabolism, RER = 1.0 • e.g. C6H1206+6 O2 6 CO2 / 6 O2 = 1.0 • 100% fat metabolism, RER = 0.7 • e.g. C16H32+23 O2 16 CO2 / 23 O2 = 0.7 • 1:1 CHO to fat ratio, RER = 0.83 • assumes (incorrectly) no protein is used • HR • BP • Respiratory Exchange Ratio (RER) • Caloric Expenditure (kcals/min) • Blood Lactate

  6. Example Testing Session

  7. # # = great than both RMR and EPOC

  8. # = great than both RMR and EPOC

  9. Conclusions • Effective method of burning calories, while also providing additional caloric expenditure above baseline during a two-hour recovery • Using 30 sec work intervals followed by 60 sec rest periods elicited lactate and heart rate responses indicative of moderate intensity exercise • Carbohydrates were the primary fuel source during the TRX workout, while lipids were the predominant source during recovery

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