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Effects of exercise training amount and intensity on peak oxygen consumption in middle-age men and women at risk for cardiovascular disease.
Chest. 2005 Oct; 128(4):2788-93.Chest

Abstract

STUDY OBJECTIVES

Although increasing aerobic fitness by exercise training is advocated as part of a healthy lifestyle, studies examining the different effects of intensity and amount on peak consumption (V(O2)) remain sparse.

DESIGN

This randomized controlled trial compared the effects of three different exercise regimens differing in amount and intensity on fitness improvements.

PARTICIPANTS

Overweight men and women with mild-to-moderate dyslipidemia were recruited.

INTERVENTIONS

The exercise groups were as follows: (1) low amount/ moderate intensity (LAMI, n = 25), the caloric equivalent of walking 19 kilometers (km)/wk at 40 to 55% of peak V(O2); (2) low amount/high intensity (LAHI, n = 36), the equivalent of jogging 19 km/wk at 65 to 80% of peak V(O2); (3) high amount/high intensity (HAHI, n = 35), the equivalent of jogging 32 km/wk at 65 to 80% of peak V(O2); and (4) a control group (n = 37).

MEASUREMENTS AND RESULTS

Peak V(O2) and time to exhaustion (TTE) were tested before and after 7 to 9 months of training. All exercise groups increased peak V(O2) and TTE compared to baseline (p < or = 0.001). Improvements in peak V(O2) were greater in the LAHI and HAHI groups compared to the control group (p < 0.02); HAHI group improvements were greater than the LAMI group (p < 0.02) and the LAHI group (p < 0.02). Increased TTE for all exercise groups was higher compared to the control group (p < 0.001)

CONCLUSIONS

Exercising at a level of 19 km/wk at 40 to 55% of peak V(O2) is sufficient to increase aerobic fitness levels, and increasing either exercise intensity or the amount beyond these parameters will yield additional separate and combined effects on markers of aerobic fitness. Therefore, it is appropriate to recommend mild exercise to improve fitness and reduce cardiovascular risk yet encourage higher intensities and amounts for additional benefit.

Authors+Show Affiliations

Department of Medicine, Division of Cardiology, Duke University Medical Center, Box 3022, Durham, NC 27710, USA. dusch001@mc.duke.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

16236956

Citation

Duscha, Brian D., et al. "Effects of Exercise Training Amount and Intensity On Peak Oxygen Consumption in Middle-age Men and Women at Risk for Cardiovascular Disease." Chest, vol. 128, no. 4, 2005, pp. 2788-93.
Duscha BD, Slentz CA, Johnson JL, et al. Effects of exercise training amount and intensity on peak oxygen consumption in middle-age men and women at risk for cardiovascular disease. Chest. 2005;128(4):2788-93.
Duscha, B. D., Slentz, C. A., Johnson, J. L., Houmard, J. A., Bensimhon, D. R., Knetzger, K. J., & Kraus, W. E. (2005). Effects of exercise training amount and intensity on peak oxygen consumption in middle-age men and women at risk for cardiovascular disease. Chest, 128(4), 2788-93.
Duscha BD, et al. Effects of Exercise Training Amount and Intensity On Peak Oxygen Consumption in Middle-age Men and Women at Risk for Cardiovascular Disease. Chest. 2005;128(4):2788-93. PubMed PMID: 16236956.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of exercise training amount and intensity on peak oxygen consumption in middle-age men and women at risk for cardiovascular disease. AU - Duscha,Brian D, AU - Slentz,Cris A, AU - Johnson,Johanna L, AU - Houmard,Joseph A, AU - Bensimhon,Daniel R, AU - Knetzger,Kenneth J, AU - Kraus,William E, PY - 2005/10/21/pubmed PY - 2005/12/13/medline PY - 2005/10/21/entrez SP - 2788 EP - 93 JF - Chest JO - Chest VL - 128 IS - 4 N2 - STUDY OBJECTIVES: Although increasing aerobic fitness by exercise training is advocated as part of a healthy lifestyle, studies examining the different effects of intensity and amount on peak consumption (V(O2)) remain sparse. DESIGN: This randomized controlled trial compared the effects of three different exercise regimens differing in amount and intensity on fitness improvements. PARTICIPANTS: Overweight men and women with mild-to-moderate dyslipidemia were recruited. INTERVENTIONS: The exercise groups were as follows: (1) low amount/ moderate intensity (LAMI, n = 25), the caloric equivalent of walking 19 kilometers (km)/wk at 40 to 55% of peak V(O2); (2) low amount/high intensity (LAHI, n = 36), the equivalent of jogging 19 km/wk at 65 to 80% of peak V(O2); (3) high amount/high intensity (HAHI, n = 35), the equivalent of jogging 32 km/wk at 65 to 80% of peak V(O2); and (4) a control group (n = 37). MEASUREMENTS AND RESULTS: Peak V(O2) and time to exhaustion (TTE) were tested before and after 7 to 9 months of training. All exercise groups increased peak V(O2) and TTE compared to baseline (p < or = 0.001). Improvements in peak V(O2) were greater in the LAHI and HAHI groups compared to the control group (p < 0.02); HAHI group improvements were greater than the LAMI group (p < 0.02) and the LAHI group (p < 0.02). Increased TTE for all exercise groups was higher compared to the control group (p < 0.001) CONCLUSIONS: Exercising at a level of 19 km/wk at 40 to 55% of peak V(O2) is sufficient to increase aerobic fitness levels, and increasing either exercise intensity or the amount beyond these parameters will yield additional separate and combined effects on markers of aerobic fitness. Therefore, it is appropriate to recommend mild exercise to improve fitness and reduce cardiovascular risk yet encourage higher intensities and amounts for additional benefit. SN - 0012-3692 UR - https://www.unboundmedicine.com/medline/citation/16236956/Effects_of_exercise_training_amount_and_intensity_on_peak_oxygen_consumption_in_middle_age_men_and_women_at_risk_for_cardiovascular_disease_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0012-3692(15)52704-9 DB - PRIME DP - Unbound Medicine ER -