3 Basic Types of Muscle Contractions Concentric – A muscle fibres shorten – Ex. biceps shorten when lifting an object Eccentric – A muscle fibres lengthen.

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Presentation transcript:

3 Basic Types of Muscle Contractions Concentric – A muscle fibres shorten – Ex. biceps shorten when lifting an object Eccentric – A muscle fibres lengthen – Ex. biceps lengthen as the same weight is placed back on the ground Isometric (static) – A muscle fibres does not change in length – Ex. trying to lift an immovable object.

Muscle Contraction During Exercise 1. Isotonic Exercise weight training with free weights, body weight exercises (chin-ups, PU, SU) Advantages  Disadvantages 

2. Isometric Exercise pressing arms against a wall. Effective for rehabilitation exercise programs. Advantages  Disadvantages 

3. Isokinetic Exercise combines the best features of both isotonic and isometric training. – Advantages  – Disadvantages 

What is Resistance Training? Examples:

Why do Resistance Training? The human body reacts to weights or other forms of exercise (stress) with some form of resistance. This causes the body to adapt to the new stress applied causing it to reform/adapt and heal better and stronger than before.

Benefits/ Effects of Resistance Training Muscularity or _______________________ ___________________our breathing increased and makes us perspire Resting metabolic rate _____________ More ____________________________ Increased bone density/bone mass Increase efficiency (neural drive, motor unit, requitment)

Effects of Resistance Training Stronger _______________, improved cardiovascular (increase O2 to blood and better CO2 removal. With a better CV system, muscles are _________________________________________ Lastly the ligaments and muscles may become more flexible to stretch

Effects of Resistance Training What can RT decrease? Why?