should i wear my apple watch while playing sports

Hi

That is a matter of personal preference.

Apple's handling instructions for Apple Watch are detailed here:

• Important safety information
• Important handling information

Whilst I appreciate that touch football is a limited-contact sport that does not involve tackling, keep in mind that Apple Watch contains sensitive electronic components and that it can be damaged if, for example, it is dropped (which is not dissimilar to diving) or crushed.

Whilst the Limited Warranty does not cover accidental damage, if your Apple Watch is eligible, then you may wish to consider buying AppleCare+.

In addition to extending the warranty period (covering any issues that may arise due to defects in materials or workmanship) and the telephone technical support period, AppleCare+ provides cover for up to two instances of accidental damage, each subject to a service fee / excess.

Details for the US, for example - including instructions at the bottom for buying AppleCare+ - are detailed here:

AppleCare+ - Apple Watch - Apple

I sure wouldn't wear my Apple Watch in a sport where it could be subject to the type of abuse football could inflict. If you do and you damage the watch, any damage incurred would most definitely not be covered under warranty.