Intermittent Exercise at Lactate Threshold Induces Lower Acute Stress than Its Continuous Counterpart in Middle-to-Older Aged Men

Taiki Yamamoto, Yukiya Tanoue, Yoshinari Uehara, Yasuki Higaki, Hiroaki Tanaka and Kenji Narazaki
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Taiki Yamamoto: Faculty of Sports and Health Science, Fukuoka University, Fukuoka 814-0180, Japan
Yukiya Tanoue: Ritsumeikan-Global Innovation Research Organization, Ritsumeikan University, Shiga 525-0058, Japan
Yoshinari Uehara: Faculty of Sports and Health Science, Fukuoka University, Fukuoka 814-0180, Japan
Yasuki Higaki: Faculty of Sports and Health Science, Fukuoka University, Fukuoka 814-0180, Japan
Hiroaki Tanaka: Faculty of Sports and Health Science, Fukuoka University, Fukuoka 814-0180, Japan
Kenji Narazaki: Center for Liberal Arts, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan

IJERPH, 2022, vol. 19, issue 12, 1-11

Abstract: This study aimed to compare the degree of exhaustion and trophic effects between continuous exercise (CE) and intermittent exercise (IE) at lactate threshold (LT) intensity. Seven healthy men (age: 43–69 years) performed the following three experimental tests in a randomized crossover order: (1) control; (2) CE, performed as a 20-min of cycling at LT intensity; and (3) IE, performed as 20 sets of a one-min bout of cycling at LT intensity with a 30-s rest between every two sets. Heart rate (HR), blood lactate concentration (LA), rating of perceived exertion (RPE), catecholamines, cortisol, growth hormone, insulin-like growth factor (IGF)-1, and brain-derived neurotrophic factor (BDNF) were measured. The sampling timing in each test was as follows: 10 min before the onset of exercise, at the 25%, 50%, and 100% time points of exercise, and at 10 min after exercise. IE was found to be accompanied by a lower degree of exhaustion than CE in measures of HR, LA, RPE, catecholamines, and cortisol. In terms of trophic effects, both of IGF-1 and BDNF increased in CE, while a marginal increase of BDNF was observed in IE. The results indicated that IE induces lower stress than CE, but may not be effective for inducing trophic effects.

Keywords: aerobic exercise; exercise prescription; preventive measures; healthy aging (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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