Stop and get medical help
If you get chest pain or pressure, feel faint or dizzy, are unusually breathless, or your heart races or beats irregularly during exercise, as our plans advise. The American Heart Association says these need immediate medical evaluation.
Source 32
Call 999 (911 in the US)
For chest pain that doesn't go away, feels tight or like squeezing, or spreads to your arms, neck, jaw, stomach or back, or comes with sweating, feeling sick, light-headedness or breathlessness; severe difficulty breathing; someone who faints while exercising; palpitations that don't go away, or come with chest pain, shortness of breath or feeling faint; or a headache that starts suddenly and is extremely painful. Don't drive yourself to A&E.
Sources 36, 37, 38, 39, 40, 41, 42
Check before you start
If you haven't exercised for some time or have a medical condition, speak to your GP first, as the NHS advises. Get advice before hard pressing if your blood pressure is uncontrolled, or you have heart disease or chest pain when you're active, a pacemaker or defibrillator, diabetic eye disease, glaucoma, a hernia, recent eye or tummy surgery, or you're pregnant, as our breathing guide lists.
Source 25
Your wrist
Contact NHS 111 for severe wrist pain, feeling faint, dizzy or sick from the pain, a snap, grinding or popping noise at the time of an injury, a wrist you can't move or hold things with, one that has changed shape or colour, or lost feeling in your hand. See a GP if wrist pain stops your normal activities, is getting worse or keeps coming back, hasn't improved after 2 weeks, or comes with tingling or loss of feeling.
Source 43
Your elbow and arm
Go to an urgent treatment centre or A&E for severe arm pain that makes it hard to move your arm, a snapping noise or a change of shape after an injury, or an arm that tingles or feels numb. A pop at the back of the elbow during a push, then sudden pain, swelling, bruising or weakness straightening your arm, needs the same without waiting: the NHS says sudden, severe pain during an activity, sometimes with a popping or snapping sound, may be a torn tendon. See a GP for elbow or arm pain that doesn't go away after a few weeks.
Sources 44, 45
Your shoulder
Ask for an urgent GP appointment or get help from NHS 111 for sudden or very bad shoulder pain, an arm you can't move, a shoulder that has changed shape or is badly swollen, pins and needles that don't go away, or no feeling in your arm or shoulder. See a GP if shoulder pain is getting worse or doesn't improve after 2 weeks.
Source 46
Very sore, swollen or weak arms, or dark urine
After a big session, get medical help the same day (NHS 111, or urgent care in the US). Severe exertion can break down muscle (rhabdomyolysis), with dark, red or cola-coloured urine; it has followed a push-up-heavy boot camp, and 250 push-ups in a contest led to compartment syndrome in both arms, needing surgery (the man had also used cocaine the night before). Sudden, severe pain in a limb is a 999 or A&E call.
Sources 47, 48, 49, 50