Article continues below advertisementOK! can reveal Ryan Seacrest has ignited a fresh wave of concern among fans and friends after showcasing a dramatically muscular physique online - prompting claims his relentless training schedule is pushing his body too far as he chases a big-screen action-hero look.Seacrest, 51, the longtime host of American Idol and Wheel of Fortune, posted an Instagram video in November showing himself grinding through seated bicep curls in a navy T-shirt and gym shorts, his arms visibly bulging as a trainer counted out repetitions.