European Journal of Applied Physiology

, Volume 115, Issue 5, pp 1005–1013

Effects of 2 weeks of low-intensity cycle training with different pedaling rates on the work rate at lactate threshold

  • Masami Hirano
  • Munehiro Shindo
  • Saki Mishima
  • Kazuhiro Morimura
  • Yoshiyasu Higuchi
  • Yosuke Yamada
  • Yasuki Higaki
  • Akira Kiyonaga
Original Article

Abstract

Purpose

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 (\(\dot{V}\)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, \(\dot{V}\)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.

Keywords

Pedal frequency Lactate threshold Aerobic exercise Short-term training Near-infrared spectroscopy 

Abbreviations

ANOVA

Analyses of variance

BMI

Body mass index

DBP

Diabolic blood pressure

HFTr

High frequency pedaling rate training

HR

Heart rate

La

Blood lactate

LFTr

Low frequency pedaling rate training

LST

Low-intensity resistance training with slow movement and tonic generation

LT

Lactate threshold

NIRS

Near-infrared spectroscopy

OxyHb/Mb

Oxy-hemoglobin/myoglobin concentrations

PFIS

Pedal force of integral per single cycle

RER

Respiratory exchange rate

RPE

Rating of perceived exertion

SBP

Systolic blood pressure

\(\dot{V}\)E

Pulmonary ventilation

\(\dot{V}\)O2

Oxygen consumption

\(\dot{V}\)O2max

Maximal oxygen consumption

\(\dot{V}\)O2max/Wt

Maximal oxygen consumption per weight

WorkLT

Work rate at lactate threshold

WorkLT/Wt

Work rate at lactate threshold per weight

Workmax

Work rate at maximal oxygen consumption

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Masami Hirano
    • 1
    • 2
  • Munehiro Shindo
    • 1
  • Saki Mishima
    • 1
  • Kazuhiro Morimura
    • 1
  • Yoshiyasu Higuchi
    • 3
  • Yosuke Yamada
    • 2
    • 4
  • Yasuki Higaki
    • 1
    • 2
  • Akira Kiyonaga
    • 1
    • 2
  1. 1.Faculty of Sports and Health ScienceFukuoka UniversityFukuokaJapan
  2. 2.Central Research Institute for Physical ActivityFukuoka UniversityFukuokaJapan
  3. 3.Laboratory of Physical ScienceFukuokaJapan
  4. 4.National Institute of Health and NutritionTokyoJapan

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