His role as Reacher, the muscle-bound (and t-shirt-averse) former military man, probably has something to do with this. The biceps curls and triceps extensions lived up to their reputation as tried and tested muscle-builders for the arms. Read more: I’m a trainer specialising in longevity – these are the five changes that have the biggest impact on my clientsWould I do Alan Ritchson’s workout again? Ritchson’s workout, on the other hand, is dead set on building you a bigger set of arms and shoulders. Read more: I tried a two-move bodyweight workout from endurance swimmer Ross Edgley, and it was surprisingly funHow does Alan Ritchson build muscle?