HFA's Dumbbell Workshop Share this product: Tweet This Dumbbell Workshop is full of informative tips on how to use dumbbells in a fitness class or one on one. Included is information on how to warm-up for weights, which muscle groups are being used during specific exercises, body posture and helpful cues for your participants. Purchase this workshop online and gain access (one full month) to the Dumbbell Workshop Video. This workshop is worth 2 BCRPA and OFC fitness renewal credits Workshop Conductor: Silvia Isachsen, Registered Trainer of Trainers