Bear Grylls presents Week 4 of his 40 day military fitness challenge to get Brits into shape

THE sun is shining and Bear Grylls is urging you to get outside and get fit.

His Be Military Fit course is all about challenging yourself in the fresh air.

Over the last few weeks he’s been sharing a series of exclusive videos for Sun readers – and here he unveils the fourth, as part of a 40 day challenge.

He said: “It’s accessible and achievable – let’s do this!”