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 23
Call 999 or go to A&E: back pain with these signs
Loss of feeling or numbness around the genitals or bottom, new trouble peeing or controlling your bladder or bowels, changes in genital sensation during sex or problems with erections or orgasm, or pain, tingling, weakness or numbness in both legs. These are signs of cauda equina syndrome, which needs treating in hospital urgently. Don't drive yourself.
Source 10
Call 999 (911 in the US)
For chest pain that feels tight, heavy or squeezing, or spreads to your arms, neck, jaw or back; arm pain that comes on suddenly with pressure, heaviness or squeezing across your chest; a headache that starts suddenly and is extremely painful, especially while lifting or straining; someone who faints while exercising; palpitations that don't go away, or come with chest pain, breathlessness or feeling faint; severe difficulty breathing; or angina pain that doesn't stop after rest and your medicine. Don't drive yourself to A&E.
Sources 26, 27, 28, 29, 30, 31, 32, 33, 34
Check before lifting heavy
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 heavy lifting 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.
Sources 35, 23
After a faint, or dizziness that keeps coming back
See a GP after any faint, and for dizziness that won't go away or keeps coming back.
Sources 31, 36
Go to an urgent treatment centre or A&E: a pop at the elbow
A sudden pop at the front of the elbow during a heavy pull, with bruising, a gap at the front of the elbow or a bulge in the upper arm, can be a torn biceps tendon: don't wait for it to settle, because it's best repaired within the first 2 to 3 weeks. In the US, go to urgent care or the emergency department.
Sources 28, 37
Ask for an urgent GP appointment or call NHS 111
For back pain with a high temperature, or if you feel hot, cold, shivery or generally unwell, or the pain came on suddenly and is severe or getting worse quickly.
Source 10
A pulled muscle
A sudden sharp pain in your back, side or armpit during a row may be a strained muscle. Get help from NHS 111 or an urgent treatment centre if it's very painful or getting worse, there's a lot of swelling or bruising, it's very stiff, or it isn't getting better with self-care.
Source 38
See a GP
If back pain isn't improving after a few weeks, or you have pain high in your back, between your shoulder blades.
Source 10