HOME >> BIOLOGY >> NEWS
Carry on walking!

The next time you are struggling to carry your bags home from the supermarket just remember that this could, in fact, be the reason you are able to walk upright on two legs at all! How we have evolved to walk on two legs remains a fundamental but, as yet, unresolved question for scientists. A popular explanation is that it is our ability to carry objects, particularly children, which forced early hominins onto two legs. Dr Johanna Watson (University of Manchester) will present work supporting this theory on Saturday 31st March 2007 at the Society for Experimental Biology's Annual Meeting in Glasgow.

Researchers looked at the energy expended when walking whilst carrying a 10kg load. Importantly, the distribution of the weight varied in each instance. Female participants, of child bearing age (20-30 years old) were assessed walking at a constant speed carrying either a symmetric load, in the form of a weighted vest or a 5kg dumbbell in each hand, or carrying an asymmetric load, which was a single 10kg weight carried in one hand, or a mannequin infant on one hip.

Results indicated that when carrying an evenly spread load humans are actually more efficient at carrying than most mammals but carrying awkward loads, such as an infant on one side of the body, uses much more energy. However this sort of carrying would have been inevitable once early hominins lost the ability to cling on with their feet. The high energetic cost of carrying an asymmetric load, suggests that infant carrying would need to generate significant benefits elsewhere in order to be selected for, says Dr Watson.

This work is part of a larger project, run by Dr Bill Sellers at the University of Manchester, which also uses computer simulations to try to understand evolutionary processes, particularly the way in which we and other animals move.

Future plans are to extend this study to assess the energy cost of carrying in great apes which will be very tricky i
'"/>

Contact: Gillian Dugan
gillian_dugan@yahoo.co.uk
44-079-840-30231
Society for Experimental Biology
30-Mar-2007


Page: 1 2

Related biology news :

1. Making new teeth
2. Making mice with enhanced color vision
3. Making memories that last a lifetime
4. Making daughters different -- how immune cells take divergent paths when fighting infections
5. Making a face: A new and earlier marker of neural crest development
6. Making medicine smarter
7. Making plant cells work like miniature factories
8. Muscle repair: Making a good system better, faster; implications for aging, disease
9. Making a brain
10. MIT researchers probe bones tiny building blocks
11. Fused nasal bones helped tyrannosaurids dismember prey

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/18/2019)... ... June 18, 2019 , ... Cirrascale ... introduced Data Science Workstations-as-a-Service as part of its dedicated, multi-GPU, deep learning cloud ... Data Science Workstations feature NVIDIA® Quadro RTX™ GPUs for up to 260 teraflops ...
(Date:6/14/2019)... Va. (PRWEB) , ... June 14, 2019 , ... Molecular ... is estimated to be $8,760 million in 2019. Major segments that are expected ... These are all broken out and forecasted as segments in Kalorama’s The World ...
(Date:6/11/2019)... ... 12, 2019 , ... With a rapidly growing customer base ... Geneious Biologics platform as a premium hub for bioinformatics and computer programming capabilities. ... Geneious team has done an excellent job accommodating our specific data, resulting in ...
Breaking Biology News(10 mins):
(Date:5/2/2019)... ... 2019 , ... Stay on top of current hot topics through free webinars ... all webinars is free, so be sure to register today to save your place! ... to see our upcoming webinars: , CLINICAL TRIALS , May 7 – Oncology ...
(Date:5/2/2019)... ... May 02, 2019 , ... Boston Robotic Hair Restoration ... Gone are the days of painful hair transplant procedures. Boston Robotic Hair Restoration ... the only robotic intelligent solution to offer a minimally invasive procedure. With the ...
(Date:4/25/2019)... SAN FRANCISCO (PRWEB) , ... April 24, 2019 ... ... Intelligent Virtual Agents for sales and service organizations, today announced global ... contact center software providers and enterprises of all sizes to harness the power ...
(Date:4/16/2019)... ... April 16, 2019 , ... On April ... partner, the U.S. Army Center for Environmental Health Research (USACEHR), with an award ... , Blue Sources, a veteran-owned company located at the Frederick Innovative Technology Center, ...
Breaking Biology Technology:
Cached News: