These stretches are for driving a vehicle and especially for prolonged periods of time. Driving a car is a form of sitting that also involves the coordination of the arms to steer and legs to accelerate or brake.
Both arms and leg muscles are used in driving. In the upper limb they include triceps brachii, pectoralis major, anterior and posterior deltoid, infraspinatus, biceps brachii and teres major. Some are prime movers and others are stabilizers. Which upper limb muscles are used depend on whether steering is clockwise or anticlockwise and on the technique of the driver. In the lower limb they are the gastrocnemius, soleus and tibialis anterior.
A common problem when driving is contracting muscles that are not needed for turning the wheel. Driving can be stressful and upper trapezius and levator scapulae may be inappropriately contracted at times, resulting in muscle shortening and fibrous changes within these shoulder muscles.
Driving a car mainly involves the contraction of the muscles responsible for head, cervical, upper thoracic and ….