It is mostly said and believed that HIIT (High Intensity Interval Training) is much more effective than HIIT (High Intensity Interval Training). traditional training. HIIT (High Intensity Interval Training) is a time-effective exercise strategy to improve cardiorespiratory and metabolic health. It can also induce changes in the activity of antioxidant enzymes in skeletal muscles and is used in sports training, while traditional training, on the other hand, is mainly used by people who simply want to adopt a healthy lifestyle and extend their life expectancy. In this essay, we will be able to draw a proper conclusion as to whether the statement made by the general population is really true or whether it is just an individual opinion. There are some questionable claims about whether HIIT (high-intensity interval training) is good for your health. or not. In recent research, HIIT has been found to be more enjoyable than continuous, moderate-intensity exercise (Bartlett et al. 2011). In some of the research done, it has been proven that high intensity interval training can improve cardiorespiratory fitness. in a wide range of populations, including those with coronary heart disease, congestive heart failure, middle-aged adults with metabolic syndrome, and people with obesity. In many cases, the improvement in cardiorespiratory fitness after high-intensity interval training was greater than after moderate-intensity continuous training (Wisloff et al. 2007; Tjonna et al. 2008, 2009; Moholdt et al. 2009). Moreover, it is. HIIT (high-intensity interval training) is also said to be more likely to cause favorable changes in high-density lipoprotein cholesterol and total cholesterol, but not total cholesterol in young adult men.... . middle of article...... logical adaptations to low-volume high-intensity interval training in health and disease, journal of Pysiology, 145(6)1077-10842. Christian Finn (2001) http://www.sportsci.org/jour/0101/cf.htm3.Musa, Danladi I; Adeniran, Samuel A, Dikko, AU; Sayers, Stephen (2009) The effects of the HIIT program on high-density lipoprotein cholesterol in young men, Lippincott Williams & Wilkins, 23 (2), 587-5924. Matsubara T. Miyaki A. Akazawa N. Choi Y. Ra SG. Tanakashi k. Kumagai H. Oikawe S. Maedas (2014) aerobic training increases plasma klotho levels and reduces arterial stiffness in postmenopausal women, 306( 3), 348- 3555.franssen,Frits ME;Brockhuizen,Roelinka,jsnssen,Paul p,Wouters,Emeil FM,Annemie MWJ Schols(2004)American College of Chest Doctors,125(6),2021-20286. GCSE Bitesize (2014) http://www.bbc.co.uk/schools/gcsebitesize/pe/exercise/2_exercise_effectsoftraining_rev1.shtml