Why is this source not reliable? Is there any bias in it? Home-cooked food is healthier than fast food. According to a recent study by the Palo Alto Medical Foundation, fast food burgers have on average 71 calories per ounce compared to homemade burgers that contains 67 calories per ounce. That means that a fast food quarter pound burger (4 oz.), has sixteen more calories than the same burger made at home. Those added calories could lead to weight gain, which can be bad for one’s health. In addition, in a 2005 study, Dr. Harold Haines states “people who eat fast food meals more than twice a week gain about 9.92 pounds and are more likely to get diabetes than people who eat home cooked meals (2).” The more fast food you eat, the more overweight you will be, and the more likely it is that you will have health problems like heart disease, or diabetes which can prevent you from living an enjoyable and long life with your loved ones.

This isn’t a reliable source because some of the sentences are bias and have no support from a reliable explanation

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take five to 10 minutes to warm up and cool down properly.

plan to start slowly and boost your activity level gradually unless you are already exercising frequently and vigorously.

be aware that training too hard or too often can cause overuse injuries like stress fractures, stiff or sore joints and muscles, and inflamed tendons and ligaments. sports prompting repetitive wear and tear on certain parts of your body — such as swimming (shoulders), jogging (knees, ankles, and feet), tennis (elbows) — are often overuse culprits, too. a mix of different kinds of activities and sufficient rest is safer.

listen to your body. hold off on exercise when you're sick or feeling very fatigued. cut back if you cannot finish an exercise session, feel faint after exercise or fatigued during the day, or suffer persistent aches and pains in joints after exercising.

if you stop exercising for a while, drop back to a lower level of exercise initially. if you're doing strength training, for example, lift lighter weights or do fewer reps or sets.

for most people, simply drinking plenty of water is sufficient. but if you're working out especially hard or doing a marathon or triathlon, choose drinks that replace fluids plus essential electrolytes.

choose clothes and shoes designed for your type of exercise. replace shoes every six months as cushioning wears out.

for strength training, good form is essential. initially use no weight, or very light weights, when learning the exercises. never sacrifice good form by hurrying to finish reps or sets, or struggling to lift heavier weights.

exercising vigorously in hot, humid conditions can lead to serious overheating and dehydration. slow your pace when the temperature rises above 70°f. on days when the thermometer is expected to reach 80°f, exercise during cooler morning or evening hours or at an air-conditioned gym. watch for signs of overheating, such as headache, dizziness, nausea, faintness, cramps, or palpitations.

dress properly for cold-weather workouts to avoid hypothermia. depending on the temperature, wear layers you can peel off as you warm up. don't forget gloves.