Warming up before exercise works and the older you get the more important it is.
I know -- you're too busy and it's not that important.
Wrong. Warming up slowly increases your body temperature, which increases the flexibility of muscles, ligaments, tendons and cartilage and leads to fewer strains, sprains and tears.
Warm-up movements also activate the fluids in your joints, reducing friction and wear and tear. Warming up gives your heart time to push blood and nourishment into your muscles and gives your heart time to adjust.
Sudden exercise can lead to heart attacks.
The older we get the more important warming up is because we have less supple tissues, less joint fluid and weaker hearts. Warming up can include stretching but it's not the same.
Warming up means gently using your workout muscles enough to sweat a bit and raise your body temperature, like walking for five to ten minutes before you jog.