No, not sit-ups — trainer shares these 6 exercises to blast your core in just 12 minutes
This trainer-led workout will challenge your core muscles, including the abs, in 12 minutes. No sit-ups included!
Six months of reformer Pilates made more difference to my core than in 10 years of abs workouts
Helen O'Leary, director and clinical director at Complete Pilates explains that the reformer consists of a “sliding flat ...