A forty-year old competitive weightlifter has taken a strong broad-spectrum antibiotic that was prescribed after routine...

A forty-year old competitive weightlifter has taken a strong broad-spectrum antibiotic that was prescribed after routine dental surgery. One of the side effects was permanent damage to some of his tendons and muscles. What factors would be involved in his switching over to endurance sports? Be sure to discuss the factors affecting the three types of muscle fibers, how they operate metabolically and how they do or don’t respond to training or conditioning.

Expert Solution

There are three types of muscle fibres. Slow twich,fast twich and fast twich type IIb.

The slow twich is good for endurance. They won't get tired soon. They use oxidative method for respiration. So they can work for longer. In case of fast twitch muscle they use aerobic and anaerobic means. In starting they use oxygen. If the need of oxygen is more they go for anaerobic means and produce lactic acid and thus gets fatigue. The type IIb is very fast muscles. They use anaerobic means of respiration and thus gets fatigue by accumulation of lactic acid.

As the patient was a weight lifter he used type IIb for heavy weight lifting and gets affected fast. As the tendons and muscles are affected there's are chances to dama his tendons when he lifft heavy weight. And also the muscle damage ma no help him lift heavy weight. If he switch to high endurance sports like cycling he can use slow twitch muscle. They won't get fatigue fast and they can be trained to be so. If he gets to this sport the damage to the muscles may not affect him a lot like if he was heavyweight lifter again.

Sydney Mullin answered 1 year ago

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