The DEMO version only includes 4 pages:
http://msa.training
http://msa.training/sobre-msa-training/manuel-sola-arjona.html
http://msa.training/planes-de-entrenamiento.html
http://msa.training/planes-de-entrenamiento/plan-mensual.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
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