Muscle reoxygenation difference between superficial and deep regions of the muscles during static knee extension.

Unlabelled: The purpose of this study was to test the hypothesis that differences in vertical spatial difference in reoxygenation after exercise exists, reflecting heterogeneity of muscle oxygenation during exercise might be due to the difference in dominantly recruited muscle fiber type.

Methods: Ten healthy female subjects performed 1 min static knee extension exercise at low (30%) and high (60%) fraction of maximal voluntary contraction (MVC). Muscle oxygenation in the vastus lateralis (VL) was monitored using multi channel near-infrared spectroscopy.

Perceived exertion is not necessarily associated with altered brain activity during exercise.

Previous studies have investigated the relationship between prefrontal cortex activation and perceived exertion during prolonged exercise. However, the effect of perceived exertion on prefrontal cortex activity is confounded by exercise intensity. Therefore, the changes in prefrontal cortex activity in response to perceived exertion remain unclear.

Low-volume muscular endurance and strength training during 3-week forearm immobilization was effective in preventing functional deterioration.

Purpose: The purpose of this study was to determine whether endurance and strength hand grip exercises during 3-week upper limb immobilization preserve muscle oxidative capacity, endurance performance and strength.

Methods: Ten healthy adult men underwent non-dominant forearm immobilization by plaster cast for 21 days. Five healthy adult subjects were designated as the immobilization (IMM) group and five were designated as the immobilization + training (IMM+TRN) group.

Multiple bouts of resistance exercise and postprandial triacylglycerol and serum C-reactive-protein concentrations.

The present study examined how multiple bouts of resistance exercise, performed over 1 d, influence 2 risk factors--postprandial triacylglycerol (TAG) and serum C-reactive-protein (CRP) concentrations--associated with coronary heart disease. Twenty-four men age 23.5 (SD 3.

Age and activity status affect muscle reoxygenation time after maximal cycling exercise.

Purpose: The purpose of this study was to determine the interaction of age and habitual physical activity on recovery time of muscle oxygenation following maximal cycling exercise (CycEXmax).

Methods: Twelve sedentary middle-aged (50+/-6), 13 sedentary elderly (66+/-3), 13 active middle-aged (53+/-5), and 20 active elderly (67+/-5) women participated in this study. We evaluated the peak pulmonary oxygen uptake (VO2peak) during CycEXmax and the half-recovery time of muscle oxygenation (T1/2reoxy time) using near-infrared spectroscopy at the vastus lateralis (VL) during the recovery phase after CycEXmax.

Increased postprandial triacylglycerol concentrations following resistance exercise.

Purpose: There is conflicting evidence whether a single bout of resistance exercise performed the day before a test meal can lower postprandial triacylglycerol (TAG) concentrations. The present study examined the effect of a single session of resistance exercise, performed the same day as a test meal, on postprandial TAG concentrations in resistance-trained males.

Methods: Ten healthy males aged 25 (SD 2.

Noninvasive monitoring of deterioration in skeletal muscle function with forearm cast immobilization and the prevention of deterioration.

BACKGROUND: In this research inactivity was simulated by immobilizing the forearm region in a plaster cast. Changes in skeletal muscle oxidative function were measured using near-infrared spectroscopy (NIRS), and the preventative effect of the training protocol on deterioration of skeletal muscle and the clinical utility of NIRS were examined. METHODS: Fourteen healthy adult men underwent immobilization of the forearm of the non-dominant arm by plaster cast for 21 days.

Deterioration of muscle function after 21-day forearm immobilization.

Purpose: Although it is well known that immobilization causes muscle atrophy, most immobilization models have examined lower limbs, and little is known about the forearm. The purpose of this study was to determine whether forearm immobilization produces changes in muscle morphology and function.

Methods: Six healthy males (age: 21.