Comments
I disabled comments on the blog in 2013. See why at "Comments are now disabled". Technical questions should go on the MUSCLE mailing list.The goal of the Google+ page is to allow you to leave comments about my blog articles.
If you just want to know when a new article is available maybe you should subscribe to my blog RSS feed instead. It looks like many people are doing that because I have much more readers of my blog than subscribers of my blog Google+ page.
Conclusion
Feel free to leave comments related to the articles on Google+.If you want to contact me directly you should use email instead of comments. You can reach me at ludovic.rousseau@free.fr or ludovic.rousseau@gmail.com.