One of the benefits of the social media presence of big football clubs is that fans can get a glimpse inside the training ground to see their favourite players at their day job.
Usually you'll just see shooting practice or a rondo, and occasionally Wilfried Bony jogging by singing a song about himself, but Chelsea have gone for something out of the ordinary ahead of their match with Arsenal.
Chelsea TV broadcast a training session involving yoga balls for exercises to improve the players' balance and reactions. While the first drill has a clear benefit for improving off-balance ballwork, as strange as it is, the second one with the wheelbarrows and hand-balls? And the bouncing? No idea what's going on there.
Far be it from us to criticise the training sessions of a coach who is paid a lot of money to keep those athletes at peak condition, but it reminds us of those Space Hopper things everybody had around when they were kids.
Eden Hazard looked to be enjoying it anyway, earlier in the week he gave himself 5/100 defending when discussing what his stats should be on FIFA 18. His own biggest critic apparently.