title: Effects of 2 weeks of low-intensity cycle training with different pedaling rates on the work rate at lactate threshold.
abstract: OBJECTIVE
  This study examined (1) the effects of a single bout of exercise at different pedaling rates on physiological responses, pedal force, and muscle oxygenation, and (2) the effects of 2 weeks of training with different pedaling rates on work rate at lactate threshold (WorkLT).
  
  
  METHODS
  Sixteen healthy men participated in the study. An incremental exercise test involving pedaling a cycling ergometer at 50 rpm was conducted to assess maximal oxygen consumption and WorkLT. The participants performed constant workload, submaximal exercise tests at WorkLT intensity with three different pedaling rates (35, 50, and 75 rpm). Oxygen consumption ([Formula: see text]O2), blood pressure, heart rate (HR), blood lactate, and pedal force were measured and oxy-hemoglobin/myoglobin concentration (OxyHb/Mb) at vastus lateralis was monitored by near-infrared spectroscopy during exercise. The participants were then randomly assigned to cycling exercise training at WorkLT in either the low or high frequency pedaling rate (LFTr, 35 rpm or HFTr, 75 rpm) group. Each 60-min training session was performed five times/week.
  
  
  RESULTS
  Despite maintaining the same work rate, [Formula: see text]O2 and HR were significantly lower at 35 than 75 rpm. Conversely, integrated pedal force was significantly higher at 35 than 75 rpm. Peripheral OxyHb/Mb was significantly lower at 35 than 75 rpm. After 2 weeks of training, WorkLT normalized to body mass significantly increased in the LFTr, but not the HFTr group.
  
  
  CONCLUSIONS
  Pedaling rate and the corresponding pedal force and peripheral oxygenation during cycling exercise influence the effect of training at LT on WorkLT.
authors.affiliation: Faculty of Sports and Health Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan, masami.hrn@gmail.com.
authors.forename: Masami
authors.initials: M
authors.lastname: Hirano
authors.forename: Munehiro
authors.initials: M
authors.lastname: Shindo
authors.forename: Saki
authors.initials: S
authors.lastname: Mishima
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Morimura
authors.forename: Yoshiyasu
authors.initials: Y
authors.lastname: Higuchi
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Yamada
authors.forename: Yasuki
authors.initials: Y
authors.lastname: Higaki
authors.forename: Akira
authors.initials: A
authors.lastname: Kiyonaga
mesh_terms: D000328:Adult; D001642:Bicycling / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology; D010101:Oxygen Consumption / Q000502:physiology*; D055815:Young Adult
chemical_list: D019344:Lactic Acid