日本財団 図書館


S-1-04-03

THE RELATIONSHIP BETWEEN PHYSICAL FITNESS (VO2MAX) AND PARASPINAL MUSCLE FATIGABILITY IN ISOMETRIC AND SUBMAXIMAL ISOINERTIAL BACK ENDURANCE TESTS

M.Kankaan-1,2, S.Taimela-3, S-M. Kokko-1, O.Hanninen-2 and O.Airaksinen-1,.

1-Kuopio University Hospital, 2-Kuopio University, Kuopio and 3-DBC International, Vantaa, Finland

 

Purpose. To assess the relationship between physical fitness (VO2max) and fatigability of lumbar paraspinal muscles (EMG spectral fatigue index) in submaximal isoinertial and isometric (Sorerisen) back endurance tests. Methods. 30 healthy middle aged females (age 43.7±5.7y, height 164.3±5.3 cm and weight 68.0±11.0 kg; mean±SD) performed 90 sec submaximal dynamic upper trunk extensions (30 rep/min, movement amplitude 25°flexion, 5°extension) in a specially designed testing unit. Level of loading was assessed on the basis of upper body weight. After 10 min rest subjects performed the isometric endurance test (Sorensen test) to the limit of endurance. In both tests lumbar paraspinal (L5 level) EMG fatigue index decreases (%/min, MPFslope) were assessed bilaterally. For the estimate of maximal oxygen uptake (VO2max) the stepwise incremental loading (10 W/min) and continuous recording of heart rate in maximal bicycle ergometer test was used. Pearson product-moment correlation coefficients were calculated. Two-sided significance was defined as p<0.05.

Results. MPFslope showed similar progressive decreases in both isoinertial and isometric endurance tests, but the MPFslope between the tests were not related (r's 0.14-0.29). VO2max results indicated good physical fitness on average (40.8±7,32 ml/kg/min) which correlated with MPFslope in isometric back endurance test (r's 0.48- 0.63.p<0.05), but on the contrary, did not correlate with MPFslope in isoinertial endurance test (r's 0.06-0.25).

Conclusions. A good general fitness (VO2max) reflects good isometric back muscle endurance capacity, but it does not assure the good back muscle dynamic endurance capacity.

 

S-1-04-04

ANAEROBIC THRESHOLD (AT) IN PATIENTS WITH CVD

Mitsuru Majima (Saitama Medical School, Iruma-gun, Japan)

 

It is essential to improve the ability of performing activities of daily living including locomotion in rehabilitation in patients with cerebrovascular disease (CVD). Improvement of this ability can be obtained through three kinds of function; mental, neuromuscular and cardiorespiratory function. Of these, cardiorespiratory function will be focused in this report.

Although maximum oxygen uptake (Vo2 max) has been widely accepted as a comprehensive index of the cardiorespiratory function, it is difficult to measure Vo2 max in patients with CVD because of the motor impairment. In recent years, anaerobic threshold (AT) has been accepted as an index of the cardiorespiratory function in patients with heart disease, because exhaustive exercise can be avoided. This reason why AT is useful in patients with heart disease is true also in patients who can not carry out the exercise testing until exhaustion because of paresis. In this report, reproducibility of AT and effect of aging on AT in patients with CVD will be discussed.

 

 

 

BACK   CONTENTS   NEXT

 






日本財団図書館は、日本財団が運営しています。

  • 日本財団 THE NIPPON FOUNDATION