Exercise duration recommendations
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General Exercise Duration Recommendations for Adults
Current guidelines recommend that adults engage in at least 150–300 minutes per week of moderate-intensity aerobic exercise, or 75–150 minutes per week of vigorous-intensity aerobic activity, or an equivalent combination of both. Additionally, adults should perform muscle-strengthening activities involving all major muscle groups at least two days per week. For older adults, balance and fall prevention exercises are also recommended more than three times a week. These recommendations are designed to improve overall health, fitness, and quality of life, and can be accumulated in short bouts throughout the day—even sessions shorter than 10 minutes are beneficial Yang2019Rolfson2018.
Exercise Duration and Health Outcomes
Mood and Mental Health Benefits
Research shows that even short bouts of exercise, such as 10 minutes, can improve mood by increasing vigor and reducing fatigue and negative feelings. Progressive improvements in mood, especially confusion, are seen with up to 20 minutes of exercise, but longer durations do not provide additional mood benefits. These findings support the recommendation of accumulating 30 minutes of moderate exercise daily, which can be split into shorter sessions .
Cognitive Performance
For middle-aged and older adults, 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity aerobic exercise per week, whether performed in one or three sessions, significantly improves cognitive performance, reduces anxiety, and enhances cardiorespiratory fitness. These benefits are consistent with the World Health Organization’s minimum physical activity recommendations .
Special Populations: Elderly and Children
Elderly
Routine exercise with a standardized duration of at least 150 minutes per week is recommended for older adults to improve heart rate recovery and autonomic function. Studies show that elderly individuals who exercise less than this amount are at a much higher risk of abnormal heart rate recovery, which is linked to poorer cardiovascular health Mahassa2020Mahassa2020.
Children and Adolescents
Children and adolescents should aim for at least 60 minutes of moderate-to-vigorous physical activity daily, including vigorous aerobic activity and resistance or bone-strengthening exercises at least three days per week. However, many children, especially those with chronic conditions like diabetes, struggle to meet these recommendations due to barriers such as busy schedules, weather, and lack of access to facilities. School-based and home exercise programs are suggested to help overcome these challenges Yang2019Poon2024.
High-Intensity Exercise: Maximum Safe Duration
While moderate and vigorous exercise is beneficial, high-intensity training (above 90% of maximum heart rate) should be limited to a cumulative maximum of 50 minutes per week to prevent overtraining and related symptoms such as increased fatigue and hormonal imbalances .
Resistance Training and Rest Intervals
For resistance training, untrained individuals can achieve strength gains with short to moderate rest intervals (60–120 seconds), while trained individuals may benefit from longer rest intervals (over 2 minutes) to maximize strength improvements .
Exercise Recommendations for Special Conditions
For individuals with autism spectrum disorder, aerobic exercise programs of 45–60 minutes, three times per week, and muscle-strengthening sessions of 10–20 minutes, two times per week, have shown positive effects on cardiorespiratory and muscular health. Combining both types of exercise yields the greatest benefits .
Conclusion
Exercise duration recommendations vary by age, health status, and exercise intensity, but the general guideline is to aim for at least 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity aerobic activity per week, with additional strength and balance training as appropriate. Shorter bouts of exercise are effective, and special considerations should be made for high-intensity training and specific populations to maximize benefits and minimize risks Hansen2001Porter2018Mahassa2020+7 MORE.
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Exercise duration and mood state: how much is enough to feel better?
A total of 30 minutes of moderate physical exercise daily, accumulated in short bouts, improves vigor, fatigue, and overall mood, with the most significant improvements occurring after 10 minutes of exercise.
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