Background
The human body exhibits remarkable plasticity to training. For example, adaptations within the cardiovascular and respiratory systems arising from long-term endurance training serve to increase VO2max, while adaptations within the neuromuscular system arising from long-term resistance training serve to increase maximal strength.
One important physiological variable that has received little attention with regards to the effects of training is muscle force control, which can be quantified according to the magnitude and temporal structure of force fluctuations during targeted isometric contractions. The ability to control muscle force is of critical importance for many activities of daily living, such as balance and locomotion.
The project
Both endurance and resistance training have been demonstrated to alter the behaviour of motor units, which is the main determinant of force fluctuations. However, no study to date has examined the effect of either long-term endurance or resistance training on muscle force control.
Given the importance of force control for activities of daily living, understanding how training programs can influence force control is of great interest.
The purpose of this project is, therefore, to compare force control in long-term endurance trained, long-term resistance trained and sedentary individuals. This will involve a variety of advanced physiological techniques, including isokinetic dynamometry and electromyography.