The phrase "a certain amount of weight" is correct and usable in written English.
It can be used when discussing a specific but unspecified quantity of weight in various contexts, such as health, fitness, or scientific measurements.
Example: "To achieve better results, it's important to lift a certain amount of weight during your workouts."
Alternatives: "a specific weight" or "an unspecified weight".
If they don't lose a certain amount of weight, they lose the money, either to a charity, friends or family.
They need a certain amount of weight in order to keep a tight grip on the rails.
"Whether you're training for your first 5k, walking a certain amount of miles or losing a certain amount of weight, people do need help, especially the more casual users.
Many scientists now believe that weight loss is made more difficult for the obese because of biological changes that kick in when someone has gained a certain amount of weight.
He first calculated its benefits: if cattle grazing in a field put on a certain amount of weight each year, the market price of the extra meat was a logical measure.
Common examples of those initiators are trip wires, pressure plates that activate the triggering mechanism when a certain amount of weight is placed on them, infrared systems that activate the triggering mechanism when a vehicle breaks a beam's contact with its receiver, and magnetic detonators that are triggered by changes in a magnetic field (as when a vehicle passes by).
Which means he has to have a certain amount of aesthetic weight".
As I continued to announce a certain amount of lost weight, the replies from followers were motivation enough to lose more, a reinforcing cycle.
In this research, three optimization problems including minimization of the mean compliance considering a certain amount of material, minimization of weight with avoiding local stress concentration as well as minimization of weight and strain energy under local stress constraints are dealt with.
When you have reached a point where you eat a certain amount of calories and your weight hasn't fluctuated more than 3 pounds you are done.
In our method, a certain amount of PPIs with the weights higher than a threshold can be integrated into the PPI datasets.
