Rate and amplitude of adaptation to intermittent and continuous exercise in older men

Morris, Norman; Gass, G. C.; Thompson, Martin W.; Bennett, Gregory; Basic, David; Morton, Hugh R.

doi:10.1097/00005768-200203000-00014

Cited by 46 publications

(44 citation statements)

References 18 publications

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“…As a result, training intensities determined during exercise tests quickly become obsolete. The two walk tests described in this study, with intensities comparable to those used in individualized continuous and interval training programmes, [15][16][17][18] could therefore be suggested as an alternative to repeated symptom-limited exercise tests to determine optimal exercise intensity during training programmes. This kind of short walking test has already been suggested for cardiac patients.…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of oxygen uptake in elderly subjects performing two walk tests: the six-minute walk test and the 200-m fast walk test

Grémeaux¹,

Iskandar

Kervio

et al. 2008

Clin Rehabil

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Section: Discussionmentioning

confidence: 99%

Comparative analysis of oxygen uptake in elderly subjects performing two walk tests: the six-minute walk test and the 200-m fast walk test

Grémeaux¹,

Iskandar

Kervio

et al. 2008

Clin Rehabil

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“…Oxygen uptake was measured using standard open-circuit spirometry techniques. The methods used in our laboratory to measure oxygen uptake have been described previously (Morris et al 2002).…”

Section: Incremental Exercise Testmentioning

confidence: 99%

“…If the subject did not meet the criteria, then the incremental exercise test was repeated on a subsequent day. The day-to-day intraclass correlation coefficient for repeated estimates of _ V V O 2peak in men [n=10, 64 (1) years] was 0.92 (Morris et al 2002).…”

Section: Incremental Exercise Testmentioning

confidence: 99%

Physiological responses to intermittent and continuous exercise at the same relative intensity in older men

Morris

Gass

Thompson

et al. 2003

European Journal of Applied Physiology

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We investigated the physiological responses in older men to continuous (CEx) and intermittent (IEx) exercise. Nine men [70.4 (1.2) years, VO(2peak): 2.21 (0.20) l min(-1); mean (SE)] completed eight exercise tests (two CEx and six IEx) on an electronically braked cycle ergometer in random order. CEx and IEx were performed at 50% and 70% VO(2peak). IEx was performed using 60sE:60sR, 30sE:30sR and 15sE:15sR exercise to rest ratios. The duration of exercise was adjusted so that the total amount of work completed was the same for each exercise test. Oxygen uptake ( VO(2)), minute ventilation ( V(E)) and heart rate (HR) were measured at the mid-point of each exercise test. Arterialised blood samples were obtained at rest and during exercise and analysed for pH and PCO(2). At the same relative intensity (50% or 70% VO(2peak)), IEx resulted in a significantly lower ( P<0.01) VO(2), V(E) and HR than CEx. There were no significant differences ( P>0.05) in VO(2), V(E) and HR measured at the mid point of the three exercise to rest ratios at 50% and 70% VO(2peak). pH and PCO(2) during CEx and IEx at 50% VO(2peak) were not significantly different from rest. CEx performed at 70% VO(2peak) resulted in significant decreases ( P<0.05) in pH and PCO(2). There was a significant decrease ( P<0.05) in pH only during the 60sE:60sR IEx at 70% VO(2peak). Changes in arterialised PCO(2) during the 60sE:60sR, 30sE:30sR and 15sE:15sR at both 50% and 70% VO(2peak) exercise tests were not significant. When exercising at the same percentage of VO(2peak) and with the total amount of work fixed, IEx results in significantly lower physiological responses than CEx in older men. All results are given as mean (SE).

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“…Peak VO 2 improvement from exercise training may be linked to attenuated levels of oxidative stress which in turn may attenuate cytokine expression. Previous work in healthy older adults [32] and heart failure patients [33] has shown intermittent exercise programs to be at least more effective in improving peak VO 2 than a continuous regime that would produce greater cumulative oxidative stress. In our work, peak VO 2 was not significantly changed in patients who exercised despite utilizing a reasonable volume of exercise to elicit functional capacity changes.…”

Section: Discussionmentioning

confidence: 99%

Effect of Exercise Training on Interleukin-6, Tumour Necrosis Factor Alpha and Functional Capacity in Heart Failure

Smart

Larsen

Maitre

et al. 2011

Cardiology Research and Practice

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Background. We pooled data from four studies, to establish whether exercise training programs were able to modulate systemic cytokine levels of tumour necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6). A second aim was to establish if differences in ExT regimens are related to degree of change in cytokines and peak VO2. Methods. Data from four centres relating to training protocol, exercise capacity, and cytokine measures (TNF-alpha and IL-6) were pooled for analysis. Results. Data for 106 CHF patients were collated (98 men, age 62 ± 10 yrs, wt 79 ± 14 Kg). Patients were moderately impaired (peak VO2 16.9 ± 4.4 mls/kg/min), with moderate LV systolic dysfunction (EF 30 ± 6.9%), 78% (83) had ischaemic cardiomyopathy. After ExT, peak VO2 increased 1.4 ± 3.4 ml/kg/min (P < .001), serum TNF-alpha decreased 1.9 ± 8.6 pg/ml (P = .02) and IL-6 was not significantly changed (0.5 ± 5.4 pg/ml, P = .32) for the whole group. Baseline and post-training peak VO2 changes were not correlated with change in cytokine levels. Conclusions. Exercise training reduces levels TNF-alpha but not IL-6 in CHF. However, across a heterogenic patient group, change in peak VO2 was not correlated with alterations in cytokine levels. While greater exercise volume (hours) was superior in improving peak VO2, no particular characteristic of ExT regimes appeared superior in effecting change in serum cytokines.

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Rate and amplitude of adaptation to intermittent and continuous exercise in older men

Abstract: These results suggest that the amplitude and rate of change of select adaptations in men aged 60-70 yr are independent of the mode of training (i.e., continuous or intermittent exercise) when the absolute training intensity and the total amount of work completed were similar.

Cited by 46 publications

References 18 publications

Comparative analysis of oxygen uptake in elderly subjects performing two walk tests: the six-minute walk test and the 200-m fast walk test

Comparative analysis of oxygen uptake in elderly subjects performing two walk tests: the six-minute walk test and the 200-m fast walk test

Physiological responses to intermittent and continuous exercise at the same relative intensity in older men

Effect of Exercise Training on Interleukin-6, Tumour Necrosis Factor Alpha and Functional Capacity in Heart Failure

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