Effects of Resistance Training Volume and Variety on Dietary Intake and Mood State in Untrained Subject
Background: While there is research on the effects of aerobic training on various aspects of mood state and nutrient intake, little is known of the effect of resistance training on these variables. Purpose: To examine the effects of resistance training (RT) volume and variety on total energy (kcal) and macronutrient intake, and mood states in a healthy, untrained population. Method:The investigation was part of a prospective experimental study examining the effects of three RT protocols on body composition and strength. An initial 102, healthy, untrained male and female participants, ages 20-40, were recruited, and randomized into one of three groups with differing RT volumes and varieties: (1) One set of eight different resistance exercises, 8-12 RM, (2) Three sets of the same eight different resistance exercises, 8-12 RM, or (3) One set of 24 resistance exercises, including the original eight from groups one and two, with an additional 16 exercises. All groups were required to exercise 2x/week the first eight weeks and 3x/week for the remaining 16, for a total of 24 weeks. At baseline and at weeks 12 and 24, subjects completed a 3- day diet record and a 65-item Profile of Mood States (POMS) questionnaire. Results: There were no significant differences in total energy (kcal), macronutrient intake, mood states or Total Mood Disturbance (TMD) scores between groups, over time. However, across groups, there was a trend for reductions in total energy intake from baseline to week 24 (148 kcals/week), for an overall reduction of approximately 3,500 kcals or the energy equivalent of one pound of body fat. There were trends towards decreases in all negative mood scores and TMD, with increases in the only positively weighted mood score, vigor. Conclusions: These results indicate that differences in RT volume or variety do not appear to have a distinct influence on mood state, macronutrient percentage or total energy intake in a healthy, untrained population. Thus, emphasizing diet and mood benefits of different RT regimens is not warranted.
Human and Clinical Nutrition, Preventive Medicine, Psychology of Movement, Public Health Education and Promotion, Exercise Therapy -- psychology; Affect; Food Habits; Diet; Energy Intake.
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