It's totally normal to feel low in energy during the first few days of your period, but instead of giving in to the temptation of a week on the sofa accompanied by wine, chocolate and blankets galore, why not head to the gym instead? 
We know it sounds like a crazy suggestion; who in their right mind would pick a workout over a Netflix binge when your stomach's cramping and it feels like your womb is falling out? Well, actually, science has shown that there are a lot of benefits to exercising whilst on your period – including reduced PMS symptoms.
Here, Anna Druet – science researcher at women's health app Clue – explains:
It might be difficult to find the motivation to exercise when you are on your period, as you might feel moody, bloated and experience cramps. However, if you start slowly and ease yourself into it, you may feel better within 10 minutes of exercising. Exercise improves blood flow and as such, can provide pain relief for cramps. Additionally, exercise also creates an endorphin boost, leaving you feeling happier and more energetic."
What to do
You can also harness the powers of your period by mainlining on certain exercises. For example, Anna says that this is one of the best times in the month to work your muscles.
The menstrual cycle and exercise are closely interlinked, as oestrogen and progesterone are the two hormones that affect body temperature, metabolism and heart function, and even the elasticity of our ligaments. For example, some studies have found that it is better to do strength training during the follicular phase (from the first day of your period until ovulation), as muscle strength is greater at that time
Yoga has also been found to be especially beneficial just before and during the period, as it can provide an anti-stressor and antidepressant effect on the body. Indeed, yoga nidra (a yoga-based relaxation therapy) is effectively prescribed the treatment of menstrual problems.
"Certain yoga positions, like bow, camel and child's pose can stretch out the areas where we experience cramps, thus reducing the pain. Similarly, the breathing exercises which are part of yoga have been found to reduce feelings of stress and anxiety in the run-up to the period."
When to rest
Exercise is always beneficial towards our health, which is why it is always a good idea to do some form of physical activity regularly. However, you might want to get exercise in early on in your period, as your energy levels will gradually begin to dip.
"As progesterone rises in the second half of your cycle, causing a temperature rise as well, you might find that you tire more easily or aren't performing as well as usual. The second half of the cycle is a good time to take some rest days and not force yourself to 'power through', doing some lighter exercise instead, like going for a walk.