Lifted weights yesterday and today my whole left arm (shoulders to fingers) aches. Random, sharp, tingling shooting pains In fingers too? Heart?

Impinging nerve. looks like sport careful during exercise to avoid injuries. may use help of trainer.
Unlikely. Aching shoulder, arm and fingers the day after weight lifting is more likely musculoskeletal than cardiac. The random sharp shooting pains in your fingers may be due to some nerve involvement similar to carpal tunnel syndrome. Cardiac pain would be expected to occur while you were exercising. Hope this helps.

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