05/31/2026
"How the exercise is framed, the context in which it is delivered, and the patient’s interpretation of it matter far more than the actual number of plates on the barbell"
In most PT clinics, while we say we are doing something to "strengthen" (which we are) but we are doing activities that do much more for a person in pain and with some issue. Yes there are clinics full of athletes with ACL reconstructions at 10-months post op doing some high level things...but most are full of regular people with aches, pains and issues. For those we can load more we do, others aren't in that frame of mind, and this research says we can still get good benefits without the heavier loading. -Duffy
𝗗𝗼𝗲𝘀 𝗟𝗶𝗳𝘁𝗶𝗻𝗴 𝗛𝗲𝗮𝘃𝗶𝗲𝗿 𝗠𝗲𝗮𝗻 𝗙𝗲𝗲𝗹𝗶𝗻𝗴 𝗕𝗲𝘁𝘁𝗲𝗿? 𝗔 𝗗𝗲𝗲𝗽 𝗗𝗶𝘃𝗲 𝗶𝗻𝘁𝗼 𝗟𝗼𝗮𝗱𝗲𝗱 𝘃𝘀. 𝗨𝗻𝗹𝗼𝗮𝗱𝗲𝗱 𝗧𝗿𝗮𝗶𝗻𝗶𝗻𝗴 𝗳𝗼𝗿 𝗖𝗵𝗿𝗼𝗻𝗶𝗰 𝗟𝗼𝘄 𝗕𝗮𝗰𝗸 𝗣𝗮𝗶𝗻
⬛ For years, physical rehabilitation has operated on a seemingly logical assumption: to fix a bad back, you need to build a stronger back.
⬛ As a result, resistance training using external loads like free weights, machines, and heavy elastic bands has become a staple in managing chronic non-specific low back pain.
⬛ But a 2025 systematic review and meta-analysis by Ranzani et al. challenges this conventional wisdom, asking a crucial question:
▪️ Is resistance training with external loads actually superior to unloaded bodyweight exercise?
▪️ 𝗧𝗵𝗲 𝗦𝘁𝘂𝗱𝘆 𝗮𝘁 𝗮 𝗚𝗹𝗮𝗻𝗰𝗲
⬛ The researchers analyzed 13 randomized controlled trials involving 778 adult participants with chronic non-specific low back pain.
⬛ The study aimed to isolate the specific effect of external resistance by comparing externally loaded resistance training groups against unloaded exercise groups who performed movements using only internal resistance or bodyweight.
⬛ The researchers evaluated both primary outcomes including pain intensity and disability, and secondary outcomes including muscle endurance, maximal strength, and psychosocial factors like fear-avoidance and pain catastrophizing.
▪️ 𝗞𝗲𝘆 𝗙𝗶𝗻𝗱𝗶𝗻𝗴𝘀: 𝗧𝗵𝗲 “𝗗𝗶𝘀𝘀𝗼𝗰𝗶𝗮𝘁𝗶𝗼𝗻” 𝗕𝗲𝘁𝘄𝗲𝗲𝗻 𝗦𝘁𝗿𝗲𝗻𝗴𝘁𝗵 𝗮𝗻𝗱 𝗣𝗮𝗶𝗻
𝗣𝗮𝗶𝗻 𝗮𝗻𝗱 𝗗𝗶𝘀𝗮𝗯𝗶𝗹𝗶𝘁𝘆: 𝗔 𝗧𝗶𝗲 𝗚𝗮𝗺𝗲
⬛ The most striking finding of the review is that both loaded and unloaded training lead to similar reductions in pain and disability.
⬛ For extended training programs lasting more than 7 weeks, adding external loads provided a very small, statistically significant advantage in pain reduction with a mean difference of -0.52 on a 0–10 scale.
⬛ However, this difference did not meet the Minimal Clinically Important Difference, meaning patients likely would not notice the difference in their daily lives.
⬛ For short-term programs under 6 weeks and long-term post-washout follow-ups, there were no significant differences in pain outcomes between the two approaches.
𝗣𝗵𝘆𝘀𝗶𝗰𝗮𝗹 𝗚𝗮𝗶𝗻𝘀 𝗗𝗼𝗻’𝘁 𝗣𝗲𝗿𝗳𝗲𝗰𝘁𝗹𝘆 𝗘𝗾𝘂𝗮𝗹 𝗣𝗮𝗶𝗻 𝗥𝗲𝗹𝗶𝗲𝗳
⬛ Unsurprisingly, the groups lifting external weights generally saw better improvements in back muscle endurance and showed potential long-term gains in maximal strength.
⬛ Yet, because these physical improvements did not translate into vastly superior pain or disability relief, the authors highlight a “dissociation.”
⬛ This challenges the old biomechanical belief that a patient’s pain is directly tied to their physical tissue capacity or physical strength.
𝗧𝗵𝗲 𝗠𝗶𝘀𝘀𝗶𝗻𝗴 𝗣𝘀𝘆𝗰𝗵𝗼𝘀𝗼𝗰𝗶𝗮𝗹 𝗗𝗮𝘁𝗮
⬛ Chronic non-specific low back pain is widely recognized as a biopsychosocial condition, meaning it is driven by a complex mix of biological, psychological, and social factors.
⬛ Unfortunately, the review revealed a major gap in current research: very few studies actually measured psychosocial variables.
⬛ Only two trials assessed fear-avoidance, and only one assessed pain catastrophizing, showing no meaningful differences between the loaded and unloaded groups.
▪️ 𝗧𝗵𝗲 𝗣𝗮𝗿𝗮𝗱𝗶𝗴𝗺 𝗦𝗵𝗶𝗳𝘁: 𝗟𝗼𝗮𝗱 𝗮𝘀 𝗮 “𝗕𝗲𝗵𝗮𝘃𝗶𝗼𝗿𝗮𝗹 𝗦𝗶𝗴𝗻𝗮𝗹”
⬛ If heavy deadlifts and bodyweight exercises offer comparable pain relief, what is actually driving the clinical improvements in patients?
⬛ The authors suggest that the benefits of exercise for chronic back pain are not solely about mechanical intensity.
⬛ Instead, improvements are likely driven by graded exposure, behavioral changes, and the therapeutic alliance.
⬛ Adding external weights can be a fantastic way to help a patient confront their fears of movement, rebuild confidence, and challenge the false belief that their back is “fragile.”
⬛ However, the researchers emphasize that the physical weight is less of a mechanical necessity and more of a “behavioral signal.”
⬛ How the exercise is framed, the context in which it is delivered, and the patient’s interpretation of it matter far more than the actual number of plates on the barbell.
▪️ 𝗖𝗹𝗶𝗻𝗶𝗰𝗮𝗹 𝗧𝗮𝗸𝗲𝗮𝘄𝗮𝘆𝘀 𝗳𝗼𝗿 𝗣𝗿𝗮𝗰𝘁𝗶𝘁𝗶𝗼𝗻𝗲𝗿𝘀 𝗮𝗻𝗱 𝗣𝗮𝘁𝗶𝗲𝗻𝘁𝘀
⬛ Consistency over Intensity:
The review suggests that total exercise volume and adherence are more critical than the intensity of the load. Low-intensity, high-frequency strategies like “exercise snacks” might be just as beneficial while feeling less threatening to the patient.
⬛ Heavy Lifting is Safe:
For patients who want to lift heavy, the data shows that externally loaded resistance training is highly safe and feasible, with adverse events being infrequent, mild, and evenly distributed between loaded and unloaded groups.
⬛ Personalization is Paramount:
Because load is a tool rather than a strict necessity, exercise prescription should be deeply individualized. If a patient enjoys and responds well to weight training, use it. If they find it intimidating and prefer bodyweight movement, they are not missing out on crucial pain-relief benefits.
▪️ 𝗨𝗹𝘁𝗶𝗺𝗮𝘁𝗲𝗹𝘆
⬛ This systematic review reinforces that exercise is a powerful, multidimensional medicine.
⬛ To effectively manage chronic low back pain, we must move past treating the spine like a purely mechanical structure and start treating the whole person.
