The phrase "are less energetic" is correct and usable in written English.
It can be used to compare the energy levels of two or more subjects, indicating that one or more of them have lower energy than the others.
Example: "After a long day at work, I find that I am less energetic than I was in the morning."
Alternatives: "are not as energetic" or "have lower energy levels."
Still, the sections on the 60's and beyond are less energetic than those chronicling the early years, maybe because the iconoclasts had become respectable.
Surveys show that companies are leery of hiring and retaining older workers because of concerns that they are less energetic, less productive, less adaptable and more likely to have outdated skills than younger workers.
This suggests there is a whole continuum of related phenomena, says Gehrels, although he admits there's no clue yet why some bursts are less energetic than others.
In this region considered as a turbulent region by Xiong et al.[14], the plasma species are less energetic and cannot penetrate deeper in the surrounding air.
In all but one case (#5), the contacts in structure C are less energetic that those in A, indicating that compression along c destabilises the inter-chain van der Waals interactions more than compression along a.
Because these metabolic pathways are less energetic than photosynthesis, life underground is expected to have been slow-growing, less dynamic in terms of diversity and interactions, and more geographically contained than, for example, subaerial phototrophs.
The bidding was less energetic at the other table where Scotland sat East-West.
These dealers have warned that they may be less energetic in selling models made by those automakers that do not fight back against online sales.
Staff members said Mrs. Mayersohn was physically healthy but had been less energetic and had grown tired of commuting to Albany in recent months.
Had the virus not affected some white men living in the country's most prosperous region, the response might have been less energetic, some suggest under their breath.
And if he was less energetic than usual and escaped after shaking just a few hands, at least that shortened the shadow he cast over the less-charismatic Mr. Kerry.
