Why do you feel hot after lifting weights?

[Roxy]

Can someone help me. The questions are in bold and my anwsers are not. Can someone explain it to me.

1. Why do you feel hot after lifting weight?
Does it have something to do with cellular respiration..
2. Can you tell when your muscles went into anaerobic respiration? What evidence was there?
pain?
3. How many more times powerful were you during aerobic exercise than during anaerobic exercise?
?

 

[Astronuc]

Excercising, or in general, using muscles requires chemical energy, which produces heat.

Buildup of lactic acid which causes pain -

The expression "lactic acid" is used most commonly by athletes to describe the intense pain felt during exhaustive exercise, especially in events like the 400 metres and 800 metres. When energy is required to perform exercise it is supplied from the breakdown of Adenosine Triphosphate (ATP). The body has a limited store of about 85 grms of ATP and would use it up very quickly if we did not have ways of resynthesising it. There are three systems that produce energy to resynthesise ATP: ATP-PC, lactic acid and aerobic.

from Lactic acid

3. How many more times powerful were you during aerobic exercise than during anaerobic exercise?

Not sure about what is being asked.

Anaerobic metabolism/respiration kicks in when the body performs an activity during which the circulatory system (including cardio-pulmonary system) cannot delivery oxygen to the muscles fast enough. The oxygen deficiency then causes anaerobic respiration.

One can for instance lift heavy weight slowly, or a lighter weight with rapid repetitions. In the latter, one is likely to initiate anaerobic respiration.

Interesting discussion on muscle development - http://home.hia.no/~stephens/hypplas.htm Has the debate been settled?

 

[ravenprp]

1. The main reason why you feel hot after lifting weights is due to an increase in body temperature. When you lift weights, your muscles contract and generate heat, which raises your body temperature. This is part of the body's natural response to physical activity and is known as thermogenesis. Additionally, your body also releases hormones such as adrenaline and noradrenaline during exercise, which can also contribute to feeling hot.
2. Yes, you can tell when your muscles have gone into anaerobic respiration. This usually occurs when you are lifting heavy weights or performing intense exercises that require a lot of energy. Some evidence of this would be a burning sensation in your muscles, fatigue, and difficulty in continuing the exercise. This is because anaerobic respiration produces lactic acid, which can cause muscle soreness and fatigue.
3. It is difficult to determine an exact ratio as it varies from person to person and depends on factors such as fitness level and type of exercise. However, in general, aerobic exercise is more efficient and can produce more power compared to anaerobic exercise. This is because aerobic exercise utilizes oxygen to produce energy, while anaerobic exercise relies on stored energy in the muscles.