For a 5' 10.4" 170 pound 15% body fat lifter, is going from an ffmi of 20.3 to 22 doable in a year

Claude Opus 4.7

Vote: Yes

At 5'10.4" (1.788m) and 170 lbs at 15% body fat, this lifter has ~144.5 lbs of lean mass, giving an FFMI of ~20.3. To reach FFMI 22 at the same height, they'd need ~156.7 lbs of lean mass at the same height — a gain of ~12 lbs of lean mass. For a non-novice but not yet advanced lifter, gaining 12 lbs of lean mass in a year is challenging but well within natural limits. Lyle McDonald's and Alan Aragon's models both suggest 0.5–1% bodyweight per month in muscle gain is realistic for intermediates, which translates to 10–20 lbs of lean mass per year. An FFMI of 22 is still well below the natural ceiling (~25), so this is achievable with consistent training, proper nutrition (slight surplus), and adequate recovery.

GPT-5.5

Vote: Yes

I vote A: "Yes". At 5'10.4", moving from an FFMI of about 20.3 to 22 means adding roughly 10–12 lb of lean mass, depending on how body fat changes. For a lifter who is not already highly advanced, that is a realistic one-year target with consistent progressive training, adequate calories, high protein, and good recovery. It would be challenging, and some of the scale gain may include fat or water, but the goal is not beyond natural limits. It becomes much less likely if the person is already an experienced, near-plateau lifter, but as a general question, it is doable.

Gemini 3.1 Pro

Vote: Yes

To determine if this is doable, we need to calculate the amount of lean body mass (LBM) required to reach the target FFMI. A height of 5' 10.4" is approximately 1.788 meters. Currently, at 170 lbs and 15% body fat, the lifter's LBM is 144.5 lbs (about 65.5 kg). This puts their current FFMI at approximately 20.5. To reach an FFMI of 22, the lifter would need an LBM of roughly 70.3 kg (155 lbs). This requires gaining about 10.5 lbs of lean tissue. An FFMI of 20.5 generally indicates an intermediate lifter. According to standard models of natural muscle growth (such as Lyle McDonald's), an intermediate male lifter can expect to gain between 10 to 12 pounds of muscle in a year of proper training and nutrition (roughly 1 lb per month). Because the required gain is ~10.5 lbs, reaching an FFMI of 22 within a year is absolutely doable.

Grok 4.20

Vote: Yes

First calculate the lean mass gain needed. At 5' 10.4" (1.79 m), moving from FFMI 20.3 to 22 requires adding roughly 12 lbs of fat-free mass while staying at or near 15% body fat. An intermediate lifter at this starting point can still add 0.5–1 lb of muscle per month under optimal progressive overload, caloric surplus, and recovery. That projects to 10–15 lbs in a year when training, sleep, and nutrition are dialed in. FFMI 22 remains well within natural limits and has been reached by many dedicated natural athletes in similar timeframes when they were not yet at their genetic ceiling. Therefore "Yes" is the correct choice.

Final Summary

The AI Roundtable reached a swift and unanimous consensus, with all four models agreeing that achieving an FFMI of 22 within a year is a realistic goal for this lifter. Claude Opus 4.7 and Gemini 3.1 Pro both calculated that the jump requires gaining roughly 10.5 to 12 pounds of lean mass, a feat they deemed well within the natural limits of an intermediate athlete. Grok 4.20 and GPT-5.5 rounded out the discussion by noting that while the target is challenging and requires 'dialed-in' nutrition, it remains significantly below the theoretical natural ceiling of 25.

No agreement after 1 rounds of discussion. Final vote: Yes: 4

Strongest Arguments

• Yes: Claude Opus 4.7 provided a robust technical justification, citing the Lyle McDonald and Alan Aragon models which suggest that an intermediate lifter can realistically gain 0.5–1% of their body weight in muscle per month, making the necessary 12-pound lean mass gain perfectly feasible within a 12-month window.