Timing and Resistance Exercise: Impact on Eating and Metabolism

ConditionsCircadian Rhythm Energy Balance Appetitive Behavior Food Reward

Trial statusNot yet recruiting

Trial phaseNot applicable

Trial typeInterventional

Biological sexMale

Age20-30

SponsorNational Taiwan Normal University

About this trial

Exercise timing (morning or evening) for optimal weight control is a research topic urgently addressed by scholars in the relevant field. Due to the better control of energy metabolism and physical activity levels in the morning, existing research on resistance exercise and eating behavior primarily focuses on experiments conducted in the morning, with only one study in the afternoon. No research has yet compared the potential differences between morning and evening resistance exercise. A one-year study aims to investigate the impact of morning and evening resistance exercise on physiological metabolism and eating behavior. Eighteen healthy male participants will be randomly assigned to a crossover design study, including AM exercise, PM exercise, and control (rest condition) trials. Variables including subjective appetite, appetite hormones (ghrelin, peptide YY), food preferences, ad libitum eating, dietary records, energy expenditure, and PBMCs circadian rhythm genes will be measured. This preliminary study through a multidimensional observation, the results will contribute to understanding the potential differences and mechanisms of morning and evening resistance exercise on physiological metabolism and eating behavior. In practical applications, conducting resistance exercise in the evening or at night aligns better with current lifestyles. The findings of this study can support the optimization of exercise benefits by validating the choice of exercise timing.

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

Age: 20-30

weight stable for at least 6 months

Disqualifiers

Obesity (BMI > 30 kg/m² or body fat percentage > 25%)

Hypertension (blood pressure over 140/90 mmHg)

Heart disease

Cancer

Trial design

Design model

Crossover

Treatments tested in this trial

The exercise in morning
Other intervention
Resistance exercises are in the following order: squat, bench press, deadlift. Each exercise consists of 3 sets with 7 repetitions, using a load of 70% 1RM with 60 sec of rest between sets. Exercise timing: AM 11:00-11:30
The exercise in evening
Other intervention
Resistance exercises are in the following order: squat, bench press, deadlift. Each exercise consists of 3 sets with 7 repetitions, using a load of 70% 1RM with 60 sec of rest between sets. Exercise timing: PM 05:00-05:30

Treatment groups

18 Participants

are divided into 3 treatment groups

Group A: The exercise in morningExperimental treatment 1 intervention

Group B: The exercise in eveningExperimental treatment 1 intervention

Group C: The control in all dayNo intervention 0 interventions

Trial outcomes

Primary outcomes

Subjective appetite Subjective appetite Subjective appetite Subjective appetite Subjective appetite Subjective appetite

The appetite perceptions are obtained through a 0-100 mm visual analog scale. The variables assessed include perceptions of hunger (i.e., "How hungry do you feel?"), satisfaction (i.e., "How satisfied do you feel?"), fullness (i.e., "How full do you feel?"), prospective food consumption (i.e., "How much do you think you can eat?"), and nausea (i.e., "How nauseous do you feel?"), with 0 indicating "not at all" and 100 signifying "extremely.".

Time frame