"strict exercise" is correct and usable in written English.
You can use it when referring to an exercise regimen that is demanding and requires discipline and consistency. For example: "I stuck to my strict exercise routine for two months and lost 15 pounds!".
In an effort to stiff-arm the aging process, Parcells adhered to a strict exercise regimen over the summer.
Michelle P. Maidenberg, a psychotherapist in Manhattan and in White Plains, said strict exercise routines aren't uncommon.
These materials were experimentally investigated to assess their suitability to bear strict exercise conditions imposed by accidental flame impingement.
Brydon has been forced, he says, to undo his trousers when he sits, but claims to be planning a strict exercise and diet regime over the summer.
The Cecchetti method of ballet training prescribes a strict exercise routine using the five positions and seven basic movements of classical ballet.
Johnson, who turns 41 in September, will get his arm rubbed down in the next few days and do his off-day throwing as part of a strict exercise routine.
"Koons, at 59, has already begun a strict exercise-and-diet regimen so that he will have a shot at working undiminished into his 80s," the profile proclaims, "as Picasso did".
Since his marriage to wife Carla Bruni-Sarkozy, Sareportedlyedly adheres to a rigorous exercise plan and strict diet that prohibits chocolate, cheese and desserts.
For example, I'm strict about exercise and the food I eat.
We see this more as an ongoing activity and future-oriented organisational philosophy rather than a strict scientific exercise [25].
To obtain the muscular physique to play Superman convincingly, Routh underwent a strict bodybuilding exercise regimen.
