The 21 Convention Official Cinematic Trailer
An official trailer for The 21 Convention was released last week including footage from one of my talks (on Objectivism, not my low back talk). I recommend checking it out and not just because it has me in. It's epic to say the least.
A comment was left on Anthony's blog regarding the speakers featured in the trailer and what impact their 'popularity' would have.
Well, I'll briefly comment that it seems more likely to me that Anthony chose not specifically those speakers he wanted in the trailer but more the idea's expressed in their talks that best exemplified each aspect that the convention aims to cover.
What I wanted to do in this post was to respond to the assertion made by MikeG.
"...wont sell tickets, neither will a guy specializing on “low back pain” guys in their early twenties don't have back pain (blahblahblah at whatever counterpoint you have to having a low back specialist speaking)..."
Anecdotal as it is, I'm fairly certain already that this assertion is false by the number of people who informed me they had LBP at the convention and the ages they were. In addition based on the interest noted at the convention it seems that there is some demand for the information.
But more importantly, had MikeG attempted a brief search of the academic literature, say even a google scholar or pubmed search (you can get free access, so no excuse really), it would have brought up enough evidence to show how ridiculous and socially conditioned this concept is.
High prevalence of LBP from ages 10~20 y/o
Here's a small sample of studies showing prevalence of LBP in adolescents and young adults and some associated factors.
To be fair it wouldn't matter whether the prevalence was high or not. Any observation of LBP in these ages would refute MikeG's claim. But interestingly some of these studies found very high prevalence.
- Kujala et al. 1992 - 10.3-13.3 y/o - Athlete's and non-athletes had similar LBP prevalence, but duration of training in last 12 months was a risk factor for 12 month prevalence.
- Salminen et al. 1992 - 15 y/o - 38 symptomatic and 38 asymptomatic participants selected from population of 1503 (not clear whether this means that there was only 38 with LBP or only 38 participated). Decreased sagittal mobility and trunk muscle strength associated with LBP.
- Salminen et al. 1995 - 15 y/o - Follow up from previous study. LBP at baseline and follow up characterised by decreased spinal function i.e mobility and strength. Disc degeneration worse at follow up in the with LBP.
- Loboeuf-Yde & Kyvik, 1998 - By age 18 (females) and 20 (males) more than 50% had experienced LBP. 1 year prevalence began at 7% in 12 y/o and reached 56% & 67% by 41 y/o with a steady increase over that period.
- Salminen et al. 1999 - 15 y/o with 9 year follow up - 35% reported LBP persistently between 14-23 y/o. Early disc degeneration was predictive of future LBP recurrence.
- Kovacs et al. 2003 - 13-15 y/o - Lifetime prevalence of LBP 50.9% (males) and 69.3% (females). Numerous associated factors, though causality can't be inferred. Interesting though is the association of greater frequency of sport participation in light of the first cited study. (Overtraining from high impact activities??)
- Brennan et al. 2007 - 20.9 y/o - Overall prevalence of LBP was 32%. Two associated factors were age and time spent engaged in personal training physical activity (again with the overtraining). Participation in sports was the only other factor that approached significance (p=0.068) (potentially high impact). The authors suggest that age (despite a difference of only 1 year between groups) was associated likely due to an increased duration of exposure.
So what to make of this? It seems that LBP is common even in adolescents and young adults. Sorry MikeG you were wrong.
It's interesting also that Salminen's studies indicated decreased trunk strength as associated with LBP, and also a temporal relationship between it (characterised at baseline) and further development of disc degeneration (at follow up in LBP group) suggesting the potential of one being caused (or at least influenced) by the other.
These studies are interesting because although chronic LBP is usually characterised as a degenerative disease and part of the aging process this evidence demonstrates that's not necessarily the case. Age related degeneration will undoubtedly have an impact, however it seems that lumbar spine dysfunction may be the more important factor.