I've been doing the GB Foundations One course pretty solidly since late Sept (even if I don't click a smiley face every time I do it) and had been seeing some great improvement in upper body strength and general fitness.
At the same time, I've been doing open session adult gymnastics locally to put what I learnt into practice. Today I managed to get a decent horizontal straddle back lever and so thought I'd try a fully extended version. To my shock, I held it horizontal for a solid 5 seconds.
Thanks to the continued development of the GB program which is the only strength training I do. Next stop, fixing my pathetic attempt at a handstand, front lever and planche!
Thank you GB!