EFFECTS OF FREQUENCY AND DURATION OF TRAINING ON ATTRITION AND INCIDENCE OF INJURY
Abstract
Eighty-seven male inmates from a state prison and 70 inmates from a county jail volunteered as subjects. The subjects, age 20 to 35 yrs, were assigned randomly into a control or exercise group. Their Vo2max and treadmill performance values were determined before and after a 20 week jogging program. Training intensity was between 85 and 90 percent of maximum heart rate and involved workouts 3 days/week for 15, 30, or 45-min duration at the state prison and for 30-min 1, 3, or 5 days/week at the country jail. Cardiorespiratory fitness improved in direct proportion to frequency and duration of training. Injury, occurred in 22%, 24% and 54% of the 15, 30, and 45-min duration groups and in 0%, 12%, and 39% of the 1, 3, and 5-day/week groups, respectively. Attrition resulting from injury occurred in 0%, 0%, and 17% and in 0%, 4%, and 6% of the same respective groups. Attrition due to lack of interest was similar for all training groups (25%), but was significantly lower in the control groups (10%). Although the results showed a greater increase in cardiorespiratory fitness for the 45-min duration and 5-day/week groups, these programs are not recommened for beginning joggers because of the significantly greater percent of injuries.
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Additional benefits of vigorous-intensity training at ≥5 sessions per week seem to be minimal.
“Additional benefits of vigorous-intensity training ≥5 sessions per week seem to be minimal, whereas the incidence of musculoskeletal injury increases disproportionately [60] .”
From Physical activity, cardiorespiratory fitness, and cardiovascular health: A clinical practice statement of the American Society for Preventive Cardiology Part II: Physical activity, cardiorespiratory fitness, minimum and goal intensities for exercise training, prescriptive methods, and special patient populations (2022) · cites this paper as [60]
Sessions lasting ≥45 minutes increase the incidence of orthopedic injury disproportionately.
“However, for novice exercisers, there is little additional aerobic benefit thereafter, and with sessions lasting ≥45 min, the incidence of orthopedic injury increases disproportionately [60] .”
From Physical activity, cardiorespiratory fitness, and cardiovascular health: A clinical practice statement of the American Society for Preventive Cardiology Part II: Physical activity, cardiorespiratory fitness, minimum and goal intensities for exercise training, prescriptive methods, and special patient populations (2022) · cites this paper as [60]
The incidence of musculoskeletal injury increases disproportionately with vigorous-intensity training at ≥5 sessions per week.
“Additional benefits of vigorous-intensity training ≥5 sessions per week seem to be minimal, whereas the incidence of musculoskeletal injury increases disproportionately [60] .”
From Physical activity, cardiorespiratory fitness, and cardiovascular health: A clinical practice statement of the American Society for Preventive Cardiology Part II: Physical activity, cardiorespiratory fitness, minimum and goal intensities for exercise training, prescriptive methods, and special patient populations (2022) · cites this paper as [60]
For novice exercisers, there is little additional aerobic benefit beyond 30-minute sessions.
“However, for novice exercisers, there is little additional aerobic benefit thereafter, and with sessions lasting ≥45 min, the incidence of orthopedic injury increases disproportionately [60] .”
From Physical activity, cardiorespiratory fitness, and cardiovascular health: A clinical practice statement of the American Society for Preventive Cardiology Part II: Physical activity, cardiorespiratory fitness, minimum and goal intensities for exercise training, prescriptive methods, and special patient populations (2022) · cites this paper as [60]
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“Additional benefits of vigorous-intensity training ≥ 5 sessions per week seem to be minimal, whereas the incidence of musculoskeletal injury increases disproportionately [60].”
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- Authors
- Pollock, M. L., Gettman, L. R., Milesis, C. A., Bah, M. D., Durstine, J. L., & Johnson, R. B.
- Venue
- Medicine & Science in Sports & Exercise
- Published
- 1976
- Volume
- 8
- Issue
- 1
- Pages
- 65
- ISSN
- 0195-9131 (ISSN-L)
- OpenAlex
- W2088250740
- Cited by
- 184
- References
- 0
- Citations by year
- 2024: 1 · 2023: 1 · 2022: 2 · 2020: 1 · 2019: 4 · 2018: 4 · 2017: 3 · 2016: 6 · 2015: 5 · 2014: 3 · 2013: 3 · 2012: 6
- FWCI
- 5.55
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Medicine & Science in Sports & Exercise (publishedVersion)
- PubMed (publishedVersion)
- Scholar Commons (University of South Carolina) (submittedVersion)
- Topics
- Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
- Health Sciences › Medicine › Physiology › Physical Activity and Health
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports injuries and prevention
- Keywords
- exercise training, jogging, exercise-related injuries, attrition, exercise frequency, training duration, cardiorespiratory fitness, VO2max, treadmill performance, prisoners, jail inmates, exercise adherence
- MeSH terms
- Adult, Athletic Injuries, Attitude, Heart Rate, Humans, Lung Volume Measurements, Male, Physical Education and Training
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