If you can score an ergonomic Herman Miller computer chair (above) for a reasonable price at Costco, there’s no excuse to be torturing your body at home or at work.

A good chair is not hard to find. And it no longer costs an arm and a leg. A bad one promotes bad posture and pain, and could be your downfall when trying to be productive. Think about how much those aches and pains block the creative pathways of the old noggin!

Sitting too forward in your seat is the number one way to injure your back and neck, since you aren’t getting the support you need. These days, good task chairs are widely available, including the classic Herman line which began selling two designs directly to shoppers last fall through 400 Costco Wholesale Corp. warehouses and the  company’s website, Costco.com.

The Equa office chairs, first introduced 24 years ago by the Grand Rapids, Mi. company, are sold in fabric or leather, and sized for medium or large occupants. They are  available in basic black from $320 for fabric to $660 for a large leather chair with polished aluminum base.

A smaller scale but fully recyclable Caper Multipurpose chair comes in three colors and sells at the store for $293. It lists for $600 and currently sells at Herman Miller retailer Sit4less.com  for $579 delivered.

Although in-store options are likely to be limited to one variation, shoppers who want a broader choice of colors in the Caper or larger size of Equa could order those from Costco’s Web site.

The good news is these chairs are not only ergonomic but also made using renewable energy in a LEED-certified factory. They also contain 21% recycled content – including 15% post-consumer waste, and all components are 100% recyclable.

Here are some other good options to keep you sitting upright so that your brilliance can flow:

The Humanscale Freedom Chair from Simply Egonomic

The fabric is green in more ways than one. It’s also eco-friendly. The Freedom chair is designed with a minimum number of manually-adjusted controls. Once the chair is fitted, no further adjustment is required. The idea is that movement, which is essential for a healthy body, shouldn’t be constricted by locking mechanisms and manual controls. It has won all kinds of awards in Canada for its ergonomic features and runs about $800.

The Heavy Duty Chair from Ergonomic Home

Much cheaper at around $387 (less $80 for the armless) this chair is big on comfort and sustainability: materials include 93% reclaimed steel, 90% recycled plastic/nylon and glues are a new HVOC-free, water-based glue developed by 3M. The Eco-system/performance upholstery is 100% recycled.

All Bodybilt High Back Chair from Ergogenesis

A contoured neckroll adds head and neck support to this handsome, comfy chair with good upper and lower back support. It also offers a 10-Point Posture Control adjustment to target stressful aches and pains which the maker argues is so often escalated by inferior chairs. The model promotes proper posture with the weight distribution on the surface once you make contact.