What Causes A Heavy Feeling Near The Shoulders After Exercising?

At random times my dad age 73, exercises 3-5 times per week. He experiences a pressure that to him feels as if he is being filled up with air... but it s an intense pressure, without pain. The pressure rises into both shoulders and up the back of his neck and seems to subside at the base of his skull. When this happens he usually stops what he is doing and sits down. He usually just takes a deep breath, and this pressure reverses itself. The whole episode usually lasts approx. 5-6 mins.