12 votes
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Why am I advised not to eat immediately before exercise?

You have two main nervous systems when it comes to energy usage / conservation. Sympathetic Increased Heart Rate Dilation of bronchioles [increased intake / exhalation of air] Dilation of Pupils ...
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  • 579
12 votes
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What are the best ways to increase fertility?

I will try to answer your question by using another perspective (risk factors for infertility). MALE Among the main causes of male infertility, "idiopathic" causes (ie not du to endocrine problems, ...
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9 votes
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Why I should avoid exercising after blood donation?

Most blood donors are a bit weakened from giving blood, despite often feeling great. The amount of blood removed from circulation reduces your possible performance level and you might tire more easily ...
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8 votes
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Smoking just after a workout

Smoking in general is unhealthy. Smoking can result in emphysema, COPD, pulmonary hypertension and other ugly diseases [1,2,3]. After a workout your heart and respiration rates are higher than at ...
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8 votes
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Is biking linked to erection- or fertility problems?

A decade ago, a study (1) reviewed the evidence regarding the effect of cycling on impotence (due for example to pudendal nerve entrapment) and the effect of repeated scrotal temperature on ...
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8 votes

How does exercise improve health?

Exercise does seem to have beneficial effects in treating and preventing many chronic diseases. As far as mechanism is concerned, we should probably narrow the scope: Question: What is the ...
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  • 3,153
7 votes
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When doing static (traditional "lean and hold" type of stretching), how long should we hold the stretch?

The general consensus on the internet and among various physical trainers is that static stretching in 20-30 second segments is sufficient to increase range of motion (ROM) in a muscle. This is ...
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  • 6,540
7 votes
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Effects of exercise while on a fast

Provided that you are healthy, not suffering from a cold, disease state or other suppression of the immune system, moderate exercise during fasting periods should not impact your health. For ...
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  • 6,540
7 votes
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Increase in acne during weight loss. Is it normal?

Well unfortunately, without a lot more detail on the changes you've made to your diet and how you go about your exercise, it is impossible to exactly pin-point where the problem is, but here are some ...
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  • 186
7 votes

Does staying at high altitudes increase your stamina?

I could not find a report where this has been formally studied but it is highly likely that persons coming to plains after staying at high altitude will feel more energetic, for a few days at least. ...
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  • 1,760
6 votes

What is the best time in a whole day for doing daily exercise like stretching, jogging, walking, cycling or swimming?

As suggested by the answers in this question on fitness.se, the best time of the day is whatever works best for you. There is no magical time that will boost your metabolism more than other times, or ...
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  • 6,540
6 votes
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Does lifting weights inhibit growth for teens and kids?

TL; DR: No, they won't impact growth if practiced within reason, and there is no damage to growth plates from injury. The medical community and the public in general seems to regard strength ...
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  • 6,540
6 votes
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How long should one wait to eat after exercise

There really aren't any known harmful effects for an otherwise healthy person to eat directly after an exercise session. You may not have as much appetite, as the body will somewhat shut down the ...
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  • 6,540
6 votes

What will happen if you keep running? What will eventually cause you to stop?

If the runner can't drink then dehydration will be the first thing that takes him out. Water is the one essential thing he's going to lose rapidly through sweat, urine and respiration, and as he loses ...
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  • 9,345
5 votes

Does lowering your resting heart rate decrease your metabolism?

The short answer is no, your metabolism isn't really driven by your heart rate. The basic definition of metabolism is that it is the process by which your body converts the food and liquid that you ...
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  • 6,540
5 votes

Is there any cure for congestive prostatitis?

Thank you for the very interesting question regarding the prostate. Let me first briefly explain a few historical confusions regarding the nomenclature of prostatic disorders with particular attention ...
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5 votes

Why am I advised not to eat immediately before exercise?

It takes energy (and blood) to digest the food. So when you eat shortly before exercising, you need the energy at two places (digestion and muscles) and the muscles win. This does not mean it is bad ...
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5 votes

What factors affect exercise induced nausea?

The simple answer is "metabolic lactic acidosis". According to Wikipedia, the duration of exercise and intensity (aerobic vs anaerobic) and prior food or drink consumption are the main factors ...
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5 votes
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What's the difference between a fast heart rate during exercise, and a fast heart rate during an anxiety attack?

It is not a fast heart rate but the underlying mechanisms that can affect health. The mechanisms involved in exercise can be beneficial and those in anxiety harmful. EXERCISE Physiological responses ...
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5 votes
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Is the number of push-ups a person can do a good risk estimate for heart attacks?

Yes, or at least, that's what this article in a reputable medical journal says and there is no reason to be more skeptical of it than the normal skepticism that any isolated article deserves. The 10 ...
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4 votes

What are the health benefits of Yoga?

Evidence for the benefits of yoga is vast and easily accessible online. It is great to see question like this which focus on the comparison of yoga to other exercises. There is quite limited amount ...
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  • 2,322
4 votes

Does the heart become stronger or weaker after an intensive workout?

We are looking at ventricular hypertrophy here. The human heart has a left and a right side. On both sides there are a ventricle and an atrium (1) (2). Basically the heart is just a bulk of muscle ...
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  • 2,322
4 votes
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Max heart rate questions

Currently, there is no definitive way to predict maximum heart rate for a single individual. There are formulae that can give an approximation, but about the only way to get a good estimate on a ...
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  • 6,540
4 votes
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What heart conditions cause dizziness after/during exercise?

Dizziness or giddiness during exercise is classically caused by obstruction to the outflow of the heart i.e. aortic stenosis (see MedlinePlus). This condition is most commonly seen in either young ...
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4 votes
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What are the effects of routine and daily meditation and physical exercise on pregnancy?

I wasn't able to find a study that looked at both meditation and exercise - besides ones about yoga - but I was able to find many that looked at each separately and seemed to indicate that combining ...
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  • 1,838
4 votes

How good, and for how long, can endorphins really make you feel?

There seems to be a misconception at the driving part of the question. Exercise has more effects (on the brain) than just stimulating a few synapses. That is indeed a vague and vastly incomplete ...
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  • 6,747
4 votes

Which foods are good for fat-burning?

As far as I know, there are no foods that burn fat in any significant amount (Mayo Clinic). To burn fat, a food would need to have "negative calories," which means less calories than the calories ...
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4 votes
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Walking as a healthy habit for the aged and my doctor's thoughts on it

I'm a physical therapist (PT) - considering we specialize in the application of movement and exercise. Consistency NOT time of day is the key to any exercise regimen. A walk in the park at 6AM or ...
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  • 1,089
4 votes
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What is the connection between health, exercise, and meditation?

Apart from the mental benefits of meditation, there is some evidence for organic/physical benefits as well. Dean Ornish, the well known cardiologist who helped former U.S. President Clinton with his ...
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4 votes
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Simulate hypoxic training by breath holding/regulation

The approach you describe most likely will not work, and could be detrimental to your training. The main benefit of training at altitude is that the body will adapt to the lower concentration of ...
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  • 6,540

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