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.
A 60-year-old man whose heart rate is 96 heartbeats per minute when heâs finished exercising needs to have a heart rate of 84 or fewer heartbeats per minute one minute later to have a normal post-exercise heart rate. A post-exercise heart rate that declines to below 73 heartbeats per minute is superior.