A study titled "Greater effects of performing a small number of eccentric contractions daily than a larger number of them once a week," published in the Scandinavian Journal of Medicine and Science in Sports indicated that daily activity was more beneficial than longer periods of exercise spread out across the week.

The research indicated that a little bit of daily activity could be a more beneficial approach, at least for muscle strength, and also suggested that individuals do not have to put in a mountain of work every day. In a study conducted in collaboration with Niigata University and Nishi Kyushu University in Japan, two groups performed 30 contractions per week, with one group doing six contractions a day for five days a week (6x5 group), while the other crammed all 30 into a single day, once a week (30x1 group). Another group only performed six contractions one day a week.

After four weeks, the group doing 30 contractions in a single day did not show any increase in muscle strength, although muscle thickness (an indicator of an increase in muscle size) increased by 5.8%. The group doing six contractions once a week did not show any changes in muscle strength or muscle thickness. However, the 6x5 group showed a significant increase in muscle strength of more than 10% along with an increase in muscle thickness similar to the 30x1 group. Professor Nosaka, the lead author of the study, stated that muscle strength is important to our health and it could help prevent the decline in muscle mass and strength with aging. He added that a decrease in muscle mass is caused by many chronic diseases such as cardiovascular disease, type 2 diabetes, some cancers, dementia, and musculoskeletal problems such as osteoporosis. 

(Source: https://www.hindustantimes.com/lifestyle/health/daily-exercise-is-more-beneficial-than-lengthier-workout-sessions-research-101660741906875.html )