Try and do push-ups with a nice straight back. If you’re not quite strong enough to do a normal push-up. Try leaning against a raised object such as a deck. If you are strong enough then try and reverse it. Put your feet on the deck. This adds a little bit more body weight into your arms. Start with five, rest a minute, do another five, rest another minute and then do another five. Repeat at Midday And again late in the afternoon.