Stuck on w1 for 2 weeks. I can only do maybe 2 of the 8, 60 sec runs. The pain in my calves is so bad that it is stopping me completing the full 60 seconds. I'm not particularly out of breath but the pain is dreadful. I'm running very very slowly I could probably walk faster! I'm in my 50s and quite overweight. I'm desperately wanting to improve my fitness and lose weight and feel quite despondent. Help and advice would be appreciated. Thank you.