During the holy month of Ramadan, Muslims across the world observe a fast.
They abstain from all food and drink - including water - for 30 days and nights, from sunrise to sunset.
It is one of the five pillars of Islam, and is intended to be a time for reflection and prayer.
The end of Ramadan is marked by Eid al-Fitr, also known as the festival of breaking the fast.
Throughout Ramadan, many Muslims continue to work - includingSergeant Yesef Nagdi, a Leicestershire Police officer.
lf I'm working from eight in the morning until four in the evening, I'll start work two hours later. I'll start at ten, I'll probably finish work at six o'clock. I get my rest during the early hours of the morning. But there's also more of a demand on officers between four and six, so I'm here to assist with that that demand. The organisation also encourages me to visit local places of worship, to go to the mosque, to observe my prayers. That's brilliant because it acts as a fantastic engagement opportunity between myself and the communities. >
Mariam Kacime is a personal trainer.
This is her advise for those who want to safely exercise during Ramadan:
For me personally, and for some of my clients, I do advise them to do something called intermediate fasting, two weeks before Ramadan, because obviously we're going to be fasting long days, which is going to be 19-20 hours. So they'll fast for 16 hours, and when they break their fast I encourage them to eat low carb food, more protein and fibre. During Ramadan we tend to exercise either before we open our fast or after fasting. >