Jenkins has remained at home to receive treatment on the injury he sustained while on Heineken Cup duty for Cardiff Blues against Racing Metro.
The Lions front row is the only absentee from the 35-man party that arrived in Gdansk on Monday, but he is expected to be given the all-clear to join his team-mates later in the week.
Fly-half Rhys Priestland (knee) and back row Dan Lydiate (ankle) were substituted during the weekend's European action, but will train in Poland while their injuries are managed.
Centre Jamie Roberts (knee) is recovering well and will continue his rehabilitation in Gdansk, while Lee Byrne (thumb) has been cleared to take a full part in training.
Wales have returned to the facility that served them so well during the build-up to the World Cup, helping produce one of the tournament's fittest teams.
Wales open their RBS 6 Nations campaign against Ireland at Lansdowne Road on Sunday week.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.