Plants: haploid generation of a plant produces gametes (sperm and eggs) and is called the gametophyte; the diploid generation produces spores and is called the sporophyte/ diploid zygote.
1 You gain the most benefits and lessen the risks when you exercise in your target heart rate zone. 2  Usually this is when your exercise heart rate (pulse) is 60 to 80 percent of your maximum heart rate. 3  In some cases, your health care provider may decrease your target heart rate zone to begin with 50 percent.
Once you know your maximum heart rate, you can calculate your desired target heart rate zone â the level at which your heart is being exercised and conditioned but not overworked. The American Heart Association and the Centers for Disease Control and Prevention recommend a general target heart rate of: 1  Moderate exercise intensity: 50 to about 70 percent of your maximum heart rate. 2  Vigorous exercise intensity: 70 to about 85 percent of your maximum heart rate.