Hamstring injuries have been a huge problem for coach John Powell 's charges - so much .
Coach is looking to review coach 's 's entire programme at the end of the year with other coaches and advisors both at home and abroad .
Hamstring injuries have been a huge problem for coach John Powell 's charges - so much so that he is looking to review his entire programme at the end of the year with other coaches and advisors both at home and abroad .