Q During recent running I found that I lacked energy, and even though my heart rate was sky-high, I seemed to be plodding around every run. I went to my GP, and he diagnosed an underactive thyroid and prescribed Thyroxine. After a month, however

other brain cells. Your thinking becomes muddled, your memory suffers and you become vulnerable to self-medicating behaviours, such as overeating.Heart:If you strap on a heart-rate monitor and walk down a dark alley at night (I don't recommend it), you

improved range of motion in the hip flexors.StressYou don't need a full-body rubdown to feel good. In a 2010 study from Sweden, one 80-minute hand-and-foot massage significantly lowered subjects' heart rates, cortisol levels and insulin levels - all

. Circadian rhythms of heart rate, respiration and oxygen consumption increase during normal waking hours, and our heart rate is about 20 per cent higher at noon than it is at midnight (even if you sleep at noon). Injury risksTriathletes are also more likely

at no more than 10 beats over their resting heart rate." That rush of 'fight or flight' adrenalin is there for a purpose – to elevate your core temperature and prime your muscles for action – but you need to control it if you're going long, says Pedlar

between 50 and 70 per cent of your maximum heart rate. When you exercise at this low intensity, your body draws energy from fat. As your heart rate goes up, more energy comes from carbs. So it seems logical that to lose fat you should keep your heart

pregnant women against exercise, fearing that the heat or high heart rate would harm the fetus. Plenty of women listened and felt stressed, tense, and fat throughout their pregnancies.Doctors now say that women who don’t exercise may be doing their babies

says.Dr Jaques advises women to keep their heart rate at or below 140 beats per minute (bpm) while exercising. Experiments on pregnant dogs suggest that running at an intensity greater than 70 per cent VO2max (the point of maximum oxygen capacity

't running long distances, you could still be at risk of overtraining. If you're super-busy at work, stressed or having relationship problems, it can impact upon your training and trigger UPS.What are the symptoms?Elevated resting heart rate Overtraining can

to exercise only at 140 bpm heart rate or below, for example, may be over-cautious for many athletes.If you're having an uncomplicated pregnancy and you were already running beforehand, then as long as everything is progressing as it should be and your doctor