To get a slimmer neck, tilt the head forward, backward and sideways while applying mild resistance with the hands when exercising, suggests the University of Maryland. These exercises improve muscle flexibility and strength. Strengthening and building muscle tissue burns calories efficiently, states WebMD.
Turn the head from side to side as slowly as possible, holding the posture for a moment between each rotation. Hand-resistance exercises or side-resistance exercises where pressure is applied to resist the head's movement while holding the head also benefits neck muscles, according to the University of Maryland. Repeat each exercise up to 10 times, thrice a day, for better neck flexibility and firmer neck muscles.