Abstract
The purpose of the present study was to use a previously developed treadmill walking test to determine training-induced changes within and between two groups of untrained men during a six week training period. One group consisted of seven middle-aged (mean age, 41.3 yr), and the second group consisted of seven young adult (mean age, 19.9 yr), men. Heart rates following training were significantly lower at all work intensities for the middle-aged men (p less than 0.005) whilst for the young adults only the 12.5% and 15% (p less than 0.025) work levels were significantly lower. Blood lactic acid concentrations (p less than 0.005), Respiratory Exchange Ratios (p less than 0.05), Ventilatory Equivalents (p less than 0.005) and mean Two Mile times (p less than 0.005) were all significantly lower after training for the older age group but this was not so for the younger adult group. The oxygen cost of the walking test was lower for four of the workloads of the middle-aged, but only for the final workload (p less than 0.005) for the young adults, after training. The performance test did not disadvantage the middle-aged subjects yet the results demonstrated that the test provided a common means of reflecting the training state of the two groups whether the level of activity took place on the treadmill or on the track.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Clausen J. P., Larsen O. A., Trap-Jensen J. Physical training in the management of coronary artery disease. Circulation. 1969 Aug;40(2):143–154. doi: 10.1161/01.cir.40.2.143. [DOI] [PubMed] [Google Scholar]
- Davis J. A., Frank M. H., Whipp B. J., Wasserman K. Anaerobic threshold alterations caused by endurance training in middle-aged men. J Appl Physiol Respir Environ Exerc Physiol. 1979 Jun;46(6):1039–1046. doi: 10.1152/jappl.1979.46.6.1039. [DOI] [PubMed] [Google Scholar]
- Ekblom B., Kilbom A., Soltysiak J. Physical training, bradycardia, and autonomic nervous system. Scand J Clin Lab Invest. 1973 Nov;32(3):251–256. doi: 10.3109/00365517309082468. [DOI] [PubMed] [Google Scholar]
- Gollnick P. D., Hermansen L. Biochemical adaptations to exercise: anaerobic metabolism. Exerc Sport Sci Rev. 1973;1:1–43. [PubMed] [Google Scholar]
- Olsen C. An enzymatic fluorimetric micromethod for the determination of acetoacetate, -hydroxybutyrate, pyruvate and lactate. Clin Chim Acta. 1971 Jul;33(2):293–300. doi: 10.1016/0009-8981(71)90486-4. [DOI] [PubMed] [Google Scholar]
- Treumann F., Schroeder W. Trainingseinfluss auf Muskeldurchblutung und Herzfrequenz. Z Kreislaufforsch. 1968 Nov;57(11):1024–1033. [PubMed] [Google Scholar]
- Varnauskas E., Bergman H., Houk P., Björntorp P. Haemodynamic effects of physical training in coronary patients. Lancet. 1966 Jul 2;2(7453):8–12. doi: 10.1016/s0140-6736(66)91743-0. [DOI] [PubMed] [Google Scholar]
- Varnauskas E., Björntorp P., Fahlén M., Prerovský I., Stenberg J. Effects of physical training on exercise blood flow and enzymatic activity in skeletal muscle. Cardiovasc Res. 1970 Oct;4(4):418–422. doi: 10.1093/cvr/4.4.418. [DOI] [PubMed] [Google Scholar]
- Williams D. H., Williams C. Cardiovascular and metabolic responses of trained and untrained middle-aged men to a graded treadmill walking test. Br J Sports Med. 1983 Jun;17(2):110–116. doi: 10.1136/bjsm.17.2.110. [DOI] [PMC free article] [PubMed] [Google Scholar]